Malicious PDF — malware analysis report

Static analysis result for SHA-256 61508cdf804f1748…

MALICIOUS

PDF

46.8 KB Created: 2020-08-29 18:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85628f842496a09e7013dc05e81fa225 SHA-1: 35b34af296a7e9d6b3b9618c1a8e7459dc48a41f SHA-256: 61508cdf804f1748f3b14e9fe201abab06fa323f5e415d27328f1716212ba466
154 Risk Score

Malware Insights

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

This PDF contains a link to a known malicious redirector, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'Verizon jetpack manual'. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm or SEO poisoning tactic to obscure the malicious URL. No scripts were extracted, but the primary malicious indicator is the redirector link.

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/wix?keyword=verizon+jetpack+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/ejercicios_de_antonimos_para_bachillerato.pdf
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/warumupuvibanebijage.pdf
    • https://cdn.shopify.com/s/files/1/0440/7014/2117/files/53225673269.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/savuralanopuzufujuxo.pdf
    • https://static.usrfiles.com/ugd/b8c837_161ab6fb037247e781f9f91ce5671a02.pdf
    • https://static.usrfiles.com/ugd/105a8c_e0c009e4d6284014ad099f5a5eb1eff6.pdf
    • https://static.usrfiles.com/ugd/b8c837_396629ec99d94ffd808ba9b983161948.pdf
    • https://static.usrfiles.com/ugd/b8c837_718fe999dfbf4161b05b24b2e5b4d640.pdf
    • https://cdn.shopify.com/s/files/1/0437/6225/3978/files/muzazuwizemisa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6285/files/sidafuliwawegoluz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3533/6616/files/pafolizirogumaga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29331550606.pdf
    • https://static.usrfiles.com/ugd/b8c837_b458b3bc71f041ed8de160528ca3fe6f.pdf
    • https://static.usrfiles.com/ugd/455f95_50296360e7bc40f19244e975f3bfa360.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005505.bin
4664fedcff64abf8091988dd08c81e7564d4aa3d70e7728522d2e05a9c932c82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5505 4940 bytes
font_01_sfnt_off000065c2.bin
aab462f11a0d82536c64205f3aa57f4967d097db35181d4f38f444d5d024b577		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C2 9816 bytes
font_02_sfnt_off000087b0.bin
2ac0a33d86fe2f69241fdd33b8be2c239c957bc82aa5c2e556ef5ecfc1a5fbba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87B0 17200 bytes
font_03_sfnt_off0000a033.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA033 4324 bytes

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