Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2e451290d8e796…

MALICIOUS

PDF

49.8 KB Created: 2020-08-09 00:39:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5681cd3e7f6a06448a5fe402345279f SHA-1: d345e03d2da9fb90d69e33ef77f6680a11043de1 SHA-256: 6c2e451290d8e7964b47dbc075d23b5fe90da83ae73f45ac97b801819f36e021
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at "https://ttraff.cc/pify?keyword=elicitation+techniques+in+software+engineering+pdf". The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise malicious content as a legitimate document. The presence of a large number of external PDF links further indicates a link farm or SEO poisoning attempt, likely to drive traffic to malicious sites.

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.cc/pify?keyword=elicitation+techniques+in+software+engineering+pdf
    • http://files.crossbowlectures.com/uploads/1/3/1/6/131606118/sebeni.pdf
    • http://files.learnguitar4fun.com/uploads/1/3/1/8/131856381/8522082.pdf
    • http://files.paloverdeafjrotc.org/uploads/1/3/2/8/132815008/ded5f16fa0af5.pdf
    • http://zinujufe.thecabinetshopoftroy.com/uploads/1/3/1/1/131164239/6900662.pdf
    • http://dejif.skylineelectricmn.com/uploads/1/3/1/1/131164250/dajoxidevamipidepov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/1375/9395/files/tarutorid.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/bebivaxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0288/8351/files/61759404494.pdf
    • https://cdn.shopify.com/s/files/1/0432/5123/7022/files/siemens_addressable_fire_alarm_system.pdf
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/rejowunepababexasi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3204/files/93706993739.pdf
    • https://cdn.shopify.com/s/files/1/0429/2070/6204/files/mupapuluzov.pdf
    • https://cdn.shopify.com/s/files/1/0431/7446/1589/files/pemafatowepowekewogubasi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/calderas_pirotubulares_y_acuotubulares.pdf
    • https://cdn.shopify.com/s/files/1/0430/0662/3903/files/roman_art_and_architecture_mortimer_wheeler.pdf
    • https://cdn.shopify.com/s/files/1/0439/4038/0840/files/kajaweti.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1573/files/bedon.pdf
    • https://cdn.shopify.com/s/files/1/0429/0658/3203/files/45844841593.pdf
    • https://cdn.shopify.com/s/files/1/0437/2060/5850/files/37870815666.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075e2.bin
89b466cba3b59c90151af7a099d6ccf933f24b0d22a21fedd41a6d03be70c2dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E2 5472 bytes
font_01_sfnt_off0000887c.bin
af59a847a31a3ece97f809c05b2e9bb59bbb2a03ad1c0eceae6a414dade692ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x887C 10128 bytes
font_02_sfnt_off0000ab0a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB0A 4324 bytes

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