Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c5a8375a81d3606…

MALICIOUS

PDF

39.2 KB Created: 2020-08-22 01:25:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6ec594a02e6a12e1a8ab7b1526df4bdf SHA-1: 177cfa81d0b0ddff4753d69e5d7ccb2f331acdde SHA-256: 8c5a8375a81d3606ad22d69de865ea44c7e4609d7646e8440be87d5a1982eb1e
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, `https://ttraff.com/pify?keyword=add+c+file+to+android+project`, is identified as a malicious redirector. The presence of a 'download button' heuristic further suggests a social engineering attempt to trick the user into clicking the malicious link. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=add+c+file+to+android+project In PDF document text
    • http://files.readingtolearnsouthafrica.com/uploads/1/3/1/4/131437873/8169101.pdfIn PDF document text
    • http://gefaj.beclitvan.com/uploads/1/3/0/7/130739423/8d9ebab4c.pdfIn PDF document text
    • http://files.kidsaroundaustin.com/uploads/1/3/1/4/131438843/1379400.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/1/0433/0687/7080/files/godikuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7020/8662/files/lulapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/91726652010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1021/8391/files/firovepabodosufosedasolib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/35411068823.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3153/5509/files/children_s_alphabet_picture_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9304/1059/files/gilitis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5656/1318/files/tapupafuroradidofob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9255/7467/files/41712212800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5593/8725/files/32001052362.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCA 5036 bytes
SHA-256: 3aef99c5ecf6b9f361f49a0d0711a547926a1cb425a260c79b2f49f835ac389b
font_01_sfnt_off00006df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF6 10072 bytes
SHA-256: ed911dbf4d5039dd22f99d72eaf31f4bd02f9a7ed276c927ffa5a504ce6b585d

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