Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6bcf059f67bdd7…

MALICIOUS

PDF

58.7 KB Created: 2020-08-12 08:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2eb4f1670d56603f8a5991001e0b7210 SHA-1: 2d102816205cb044bb3b5d1087b488de7b295e50 SHA-256: cc6bcf059f67bdd7af5e49932fa3dfe2cfeb3ec369ee53e1d34322d91b537592
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=ncert+biology+class+10+pdf', is designed to lure users into clicking it. The PDF also features a large number of external links, characteristic of SEO spam tactics. While no scripts were extracted, the presence of a malicious redirector and the link farm strongly suggest a phishing or malicious redirection attempt.

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=ncert+biology+class+10+pdf
    • http://jamofeda.marycollinshomes.com/uploads/1/3/0/7/130738799/5339328.pdf
    • http://files.cadavercarnivalstudios.com/uploads/1/3/1/0/131071157/wowekalimijukaduzagi.pdf
    • http://nelat.toptierfitnessholland.com/uploads/1/3/2/7/132740541/fipixoxaso_jenumojezizuso_sulupuwujusu.pdf
    • http://files.eeulerum.com/uploads/1/3/2/7/132740778/1038043.pdf
    • http://files.ellenhanley.com/uploads/1/3/1/4/131437593/2051962.pdf
    • https://cdn.shopify.com/s/files/1/0439/4024/9755/files/49133735551.pdf
    • https://cdn.shopify.com/s/files/1/0438/1756/6368/files/ti_sao_mt_s_file_khng_m_c.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/lajokukabifizu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0113/4754/files/ramepedemop.pdf
    • https://cdn.shopify.com/s/files/1/0432/0857/3085/files/52482999932.pdf
    • https://cdn.shopify.com/s/files/1/0432/1889/5010/files/99243345307.pdf
    • https://cdn.shopify.com/s/files/1/0428/3065/9751/files/guresojo.pdf
    • https://cdn.shopify.com/s/files/1/0448/3085/1233/files/alimentacion_parenteral_en_recien_nacidos.pdf
    • https://cdn.shopify.com/s/files/1/0436/0817/8845/files/lafanuroxubovaverapok.pdf
    • https://cdn.shopify.com/s/files/1/0430/7822/1973/files/77303464530.pdf
    • https://cdn.shopify.com/s/files/1/0430/9535/9637/files/43797818125.pdf
    • https://cdn.shopify.com/s/files/1/0432/0627/9323/files/loan_agreement_template_ontario.pdf
    • https://cdn.shopify.com/s/files/1/0430/6426/2818/files/77491591733.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a826.bin
72a757d1ae850934f3fc47912ddcf461eae54149ac0da2355aa75a7a2d727327		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA826 5728 bytes
font_01_sfnt_off0000bbb8.bin
a7f0e9a45bdf95d196af7c648f63a512bb76f280e2f8f52ec03bb61369c9803b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB8 9916 bytes

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