Malicious PDF — malware analysis report

Static analysis result for SHA-256 b07938ab1ba38188…

MALICIOUS

PDF

62.1 KB Created: 2020-08-19 05:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 877d938de1cabbce90b1526037e280f2 SHA-1: 2ff7bf21b143df0d63467f66789df1d75caf80ff SHA-256: b07938ab1ba38188dc77316f4ce2cf3c2b825290612a4e8c19216c625fd78d53
194 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with one prominent link pointing to a redirector that attempts to deliver an 'adblock paid apk'. This suggests a lure for potentially unwanted applications or malware. The document body, though heavily obfuscated, contains the malicious URL and references to adblocker software, reinforcing the observed attack pattern. No scripts were extracted, limiting the analysis to the PDF structure and embedded links.

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=adblock+paid+apk In PDF document text
    • http://filelel.myfureverfrenchie.com/uploads/1/3/0/7/130740514/737633.pdfIn PDF document text
    • http://nulufuk.makeupalchemist.com/uploads/1/3/1/8/131871578/kipagoxisubama-wixozafiki.pdfIn PDF document text
    • http://favixipob.instinctemporium.com/uploads/1/3/1/4/131454207/luvapewevifijim_majusotulofumu_kazojopun.pdfIn PDF document text
    • http://files.shallyns.com/uploads/1/3/1/4/131437984/bf6c23c420f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1456/9640/files/11364938158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6262/2358/files/complementary_filter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/xibaregajobilamapegazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6030/3774/files/general_topology_problems_and_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8647/8489/files/modern_high_end_valve_amplifiers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4398/6340/files/bumimojabebufibubowupopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7451/8178/files/20251195427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/50468773999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7805/7122/files/sales_process_excellence.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3470/6069/files/93516758391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0764/7639/files/chrooma_keyboard_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4077/6093/files/gojirodaxufuro.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_off00008f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4B 4472 bytes
SHA-256: e62241fa57ee303496496c21d154ff999d04c6e352a7f5ded897a93d70934105
font_01_sfnt_off00009e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E6A 10668 bytes
SHA-256: d39e3cb6a69c0dcfe5c300cf3e41988666bfcc7c38fed12ec691db1bd2aa92bb
font_02_sfnt_off0000c2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2DD 17444 bytes
SHA-256: a02b6155c8fa0830f0b8ec0246c272d8b20e4f6c2ec796a6b050b7c1cb623201
font_03_sfnt_off0000dd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378