Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5228524be75a53…

MALICIOUS

PDF

38.3 KB Created: 2020-08-31 01:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2d0d039968bd94b9a5b147af863d1c7 SHA-1: 061ee68390c2881dd6b20b134de9a068dc8db7d7 SHA-256: 0d5228524be75a535288934f3f6cb42441f975862e4787530d040b474b4aa728
174 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, including a primary link to `ttraff.com`, which is flagged as malicious. The document body, though heavily obfuscated, appears to contain text related to a solution manual, likely a lure to entice users to click the malicious link. The presence of numerous other PDF links suggests a link farm or SEO manipulation tactic. No scripts were extracted, but the overall structure and malicious URL indicate a phishing or scam 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.com/wix?keyword=engineering+mechanics+dynamics+4th+edition+solution+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5119/6315/files/52769610667.pdf
    • https://cdn.shopify.com/s/files/1/0432/7342/0965/files/ganis.pdf
    • https://cdn.shopify.com/s/files/1/0434/6327/8758/files/xuwirapogirera.pdf
    • https://cdn.shopify.com/s/files/1/0439/1400/2587/files/android_screenshot_app_no_ads.pdf
    • https://cdn.shopify.com/s/files/1/0435/4483/8303/files/rutazujamujinupiwaju.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/45319774764.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f6068acbefa42d9a9039bad35eae4bf.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_c6236cdabf5d47f6b4a99088376071b3.pdf
    • https://static.usrfiles.com/ugd/c1615c_305fcc1ee94a4d68a470bda32ef1900e.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/rebitufumajugixuzefi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/89793886737.pdf
    • https://cdn.shopify.com/s/files/1/0433/0120/8232/files/255293981.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_off000056a7.bin
a2c9ad2ff78ba4179d6c10f1e68ef58128341a95de99747aa3c5d45dd5ee53e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56A7 5500 bytes
font_01_sfnt_off00006936.bin
d8e0fa6a628c7680f59820eff4baf60d0c5276cc37056509b0943202e568b84b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6936 10260 bytes

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