Malicious PDF — malware analysis report

Static analysis result for SHA-256 4564b79345f896e0…

MALICIOUS

PDF

38.8 KB Created: 2020-08-22 05:53:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d053d02f41640d616ad3e7c4d1c05125 SHA-1: 5fbcd9cc76359504ce6fd774245bff118ccffccb SHA-256: 4564b79345f896e07a50b2f2f87b4c32b0df13f31ae61203d1d69ba7563096de
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Dragon Age Inquisition' and a URL that appears to be a lure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.ru/pify?keyword=dragon+age+inquisition+nightmare+leveling+guide
    • http://files.taehohwang.com/uploads/1/3/1/8/131856365/558e1635fd.pdf
    • http://files.ballatsmithycottage.com/uploads/1/3/1/3/131379181/moxalare_wobonop.pdf
    • http://files.njmco.net/uploads/1/3/1/6/131636612/0e57d.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/sapelajuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/beautician_uniform_black.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64830269039.pdf
    • https://cdn.shopify.com/s/files/1/0433/2738/9851/files/34784537372.pdf
    • https://cdn.shopify.com/s/files/1/0437/1628/0475/files/rijuxuxunisefurejus.pdf
    • https://cdn.shopify.com/s/files/1/0432/8990/3264/files/todebugub.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/21039560322.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/77959561162.pdf
    • https://cdn.shopify.com/s/files/1/0437/2532/4439/files/literatura_e_resistncia_alfredo_bosi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/62095096098.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2261/files/sizobibobiko.pdf
    • https://cdn.shopify.com/s/files/1/0431/6240/2965/files/26699449465.pdf
    • https://cdn.shopify.com/s/files/1/0429/6530/3455/files/90449552407.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bd1.bin
28b8b5a1f3119f2fdcdbedcec18cd705eca9035f0be2a90094e2f53046ab2bcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BD1 5304 bytes
font_01_sfnt_off00005da8.bin
a04d72c54375e90afada3116f22c73d7c52822c1d33c995fd3a6077cf267c480		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA8 10160 bytes
font_02_sfnt_off00008010.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8010 4324 bytes

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