Malicious PDF — malware analysis report

Static analysis result for SHA-256 852725421c2bdb1f…

MALICIOUS

PDF

41.1 KB Created: 2020-08-08 16:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1df0151b8e4822ee9ac201f40fef81ee SHA-1: 7442d1febd8060599dc6747306ed9e1a8b0c226e SHA-256: 852725421c2bdb1fc3e4396b9f1ce5ae0d2b4a7a8fc9ad54a0767c3a1cac9a87
174 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to 'anthem bcbs ohio prior authorization form pdf', aligning with phishing tactics. The presence of multiple Shopify-hosted PDF links, alongside the malicious redirector, indicates an attempt to distribute further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=anthem+bcbs+ohio+prior+authorization+form+pdf
    • http://duladika.callowayfootball.com/uploads/1/3/0/7/130776791/c0e4af3f7c.pdf
    • http://files.hqp-icimpacts.com/uploads/1/3/2/3/132302768/deteborup.pdf
    • http://files.amaysingsvgs.com/uploads/1/3/0/7/130739871/voxabovodekajor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.pdf
    • https://cdn.shopify.com/s/files/1/0436/8682/2053/files/xixulixi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/18742350358.pdf
    • https://cdn.shopify.com/s/files/1/0435/8488/0798/files/ninofasoriwaderawekozokud.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/45949540119.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/43714945243.pdf
    • https://cdn.shopify.com/s/files/1/0435/8438/9275/files/46982696863.pdf
    • https://cdn.shopify.com/s/files/1/0435/8501/1880/files/captain_america_civil_war_full_script.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75555741983.pdf
    • https://cdn.shopify.com/s/files/1/0433/8951/7973/files/junokezojumoresimekoxux.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8913/files/linksys_wrt54g_2_v1.pdf
    • https://cdn.shopify.com/s/files/1/0432/6565/4939/files/mobexe.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_off00006103.bin
d760e6bcafa1fdc053864175bcafd3ef271e7d806271b2a07bddde7ac5e50463		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6103 5540 bytes
font_01_sfnt_off000073b1.bin
f09b2e074e64505b867b4c15900172d52edb21d7840d1b1f6bce90fd487fe052		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B1 10244 bytes

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