Malicious PDF — malware analysis report

Static analysis result for SHA-256 63987c7925ca47af…

MALICIOUS

PDF

41.0 KB Created: 2020-08-09 16:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a68519729cb11e55e6b3d628a539637 SHA-1: a5f391a551be335272bb685baef5358e84f5317d SHA-256: 63987c7925ca47afe6762e95cb2a49027157f4cb8265314ee1d968071f4df4d8
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector, suggesting the primary purpose is to lead the user to harmful content. No scripts were extracted, but the presence of a malicious redirector and a link farm points to a phishing or malware distribution attempt.

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.ru/pify?keyword=cell+phone+accessories+business+plan+pdf
    • http://ranare.culturalatinamagazine.com/uploads/1/3/0/7/130775734/5913342.pdf
    • http://firij.onenationveterans.com/uploads/1/3/1/4/131409909/parujew.pdf
    • http://zuvizeri.fccbluffcity.com/uploads/1/3/0/7/130775795/3670348.pdf
    • http://files.bigislandweddingplanner.net/uploads/1/3/1/0/131070362/ae7fe8ce39.pdf
    • http://memesane.woodenbowtieentertainment.com/uploads/1/3/1/4/131453247/9240334.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rirolor.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2243/files/81670734887.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62042090741.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/62749702312.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/semeweragigosijoxuluvik.pdf
    • https://cdn.shopify.com/s/files/1/0435/5765/0584/files/52511474056.pdf
    • https://cdn.shopify.com/s/files/1/0428/1348/9318/files/7580096669.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/aap_beeti_english.pdf
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/la_crmonie_des_adieux_simone_de_beauvoir.pdf
    • https://cdn.shopify.com/s/files/1/0436/5330/0377/files/38833601865.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/benifesikazitisukitobiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/gebivaxivorajodudugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2597/2904/files/sikorajomux.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_off000060e4.bin
5890c2df0c46574d8d60df94850104ba568775a7e729f949fbbe926a60c74175		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E4 5288 bytes
font_01_sfnt_off000072c9.bin
df835643dbd90eec793983e2daadc10ae6fed34d0eac4a931df0c11dadf0d080		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C9 10564 bytes

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