Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b1f3f0ef509a41…

MALICIOUS

PDF

62.8 KB Created: 2020-07-25 19:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3414862d973271f2c92995d98dbbe6e9 SHA-1: d099422150c9c5e3c9dc108a5177a68916d36223 SHA-256: 64b1f3f0ef509a41ba99d0f85b7479e771d7c2f463c4f6aff66434f34be3f158
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'free html templates for college website'. The ML classifier strongly indicates maliciousness, and the presence of many external PDF links points to a link farm or SEO manipulation 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.com/pify?keyword=free+html+templates++for+college+website
    • http://files.nokillhuntsville.com/uploads/1/3/1/4/131455883/jalupi.pdf
    • http://files.kidsanimalsplants.com/uploads/1/3/1/6/131636978/navawutaxomunojufo.pdf
    • http://files.missionschurchorlando.com/uploads/1/3/0/9/130969313/6d545c1b873.pdf
    • http://files.shedrums.net/uploads/1/3/1/3/131379113/89ee5d54e29.pdf
    • http://files.catherinehoodillustration.com/uploads/1/3/0/9/130969371/2403899.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/46263117682.pdf
    • https://cdn.shopify.com/s/files/1/0437/9587/3949/files/zoxixabejewatan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/juxumadebamapetutorobegew.pdf
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/12228489920.pdf
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/lepaxavufojamisusabuwavo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3218030698.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/64748320601.pdf
    • https://cdn.shopify.com/s/files/1/0440/0267/2798/files/vunomasuwulobipawud.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5805/files/62065840555.pdf
    • https://cdn.shopify.com/s/files/1/0435/1908/2651/files/5427166460.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5262/files/lofijejobekawanubasezas.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b88a.bin
8d58777715fc95dff92984546b09e5dbbc1feed70e88cd2c57fbb61008d867b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB88A 5296 bytes
font_01_sfnt_off0000ca9c.bin
92603f2d07e3d92d6193335d8c3bbd677adbd40ded96e6661bb43b456792da05		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9C 10268 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.