Malicious PDF — malware analysis report

Static analysis result for SHA-256 991e0c508ad9a154…

MALICIOUS

PDF

54.7 KB Created: 2020-07-26 10:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 62e875b11c86343f7de8e73fee9e92f0 SHA-1: 851936b35c4b984d2ee90a4da13b19df434cd220 SHA-256: 991e0c508ad9a154c13031c8d8be0d62a0040b5894f7dedd3ae7ad1c2670ad63
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=guitar+tab+template+google+docs'. This indicates the document's primary purpose is to redirect users to potentially harmful content. Additionally, a PDF link farm heuristic was triggered, suggesting the document is designed to host numerous external links, many of which are hosted on cdn.shopify.com but point to other PDF files. The document body, though heavily obfuscated, contains text related to 'Guitar tab template google docs' and the authoring application 'wkhtmltopdf', reinforcing the lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=guitar+tab+template+google+docs In PDF document text
    • http://files.ukenglishmyanmar.com/uploads/1/3/2/6/132681779/munusenifudoku.pdfIn PDF document text
    • http://files.creative-change-management-online.com/uploads/1/3/2/6/132681438/bolexapedituxi.pdfIn PDF document text
    • http://files.smokymountaintax.com/uploads/1/3/1/0/131069789/vudofirenosago.pdfIn PDF document text
    • http://files.taralynnmacdougall.com/uploads/1/3/2/6/132696104/doxuxi_tasikeda_butulinexowuta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2371/8824/files/zifagoreko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9495/0556/files/1524891576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7435/5351/files/vavojevafozasorisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8419/3696/files/70984548471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7927/0561/files/61311909030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3080/4637/files/ralezizifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6824/3624/files/pulotaxima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/89289683860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/97991024223.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/14414904146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/tagemazubisexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2144/2965/files/4159264316.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000738d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x738D 5340 bytes
SHA-256: 883ea97d9daf27cee1fdb979ba005db35e18c38038af6c338cc57a70ce6df322
font_01_sfnt_off000085b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B0 3492 bytes
SHA-256: 05bedfb1291336d07dfddde0a01d6345b02b6bc292374d7f4a5f27168e1fc857
font_02_sfnt_off000093e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E4 10384 bytes
SHA-256: 5380f056187da50056172b966932d3eb28bbf919838686f1c9ddb2de44ab1de6
font_03_sfnt_off0000b7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7BB 16080 bytes
SHA-256: f3d537a75496ccc87d05ed4b58c5b0b7252e0887cb54daececbeb4e1d90d7aea