Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ced15e5fb2be58d…

MALICIOUS

PDF

54.0 KB Created: 2020-08-04 15:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8894823c0dcc119ac1b72fcf01a0563f SHA-1: 7ff2cb1f2bd420accc57999b9b1e46646d806b0a SHA-256: 5ced15e5fb2be58d58bb6bf1f7934cb1b1d30fb6e9f8a9621611dfcd1c809513
182 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though obfuscated, contains URLs that are likely intended to lead users to malicious sites. The presence of urgency and callback lures further supports a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=ceneval+egel+medicina+pdf
    • http://files.greenwoodleflorehof.org/uploads/1/3/1/4/131409037/eb4ce8b957.pdf
    • http://files.apexmartialartsgainesville.com/uploads/1/3/0/7/130775830/refinonubesi.pdf
    • http://files.deddingtonfarmersmarket.co.uk/uploads/1/3/1/6/131606159/nexoxafaxovu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5945/3845/files/css_background_size.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6773/files/81349270351.pdf
    • https://cdn.shopify.com/s/files/1/0433/6100/9829/files/45780579964.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/42036083134.pdf
    • https://cdn.shopify.com/s/files/1/0433/5747/0870/files/sat_math_probability.pdf
    • https://cdn.shopify.com/s/files/1/0432/1722/3847/files/13985717019.pdf
    • https://cdn.shopify.com/s/files/1/0433/7968/7574/files/mikes_rpg_center.pdf
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/harbor_freight_tig_welder.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3681/files/wifuximezenu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/lusizotin.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/rikakikanomogijatino.pdf
    • https://cdn.shopify.com/s/files/1/0427/7947/6134/files/gusofakarexutulesi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/7724745040.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_off000094d7.bin
1128ebcf8ad31d107f84d7dd6e44e9623f8e271cc1bf8f98079b174acb161e91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94D7 5168 bytes
font_01_sfnt_off0000a669.bin
c10acdd09eb96f8a47d4b8cb44589b259b522080a83dcd914cbcf7c8a57d6722		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA669 10796 bytes

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