Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8d5a5199092f30…

MALICIOUS

PDF

57.4 KB Created: 2020-08-26 18:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f246daaf60161cbe7c2758be38c3d703 SHA-1: 178cce106ccb9e1d659ee13d068e3a38f070a734 SHA-256: 9e8d5a5199092f30334baa7cdada72687c904cc2925fdfd5035a9c6b2556a9e3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the text 'Fundamentals of financial management concise 7th edition solution manual pdf' and the malicious URL, suggesting a lure to download a fake manual. The ML classifier strongly flagged this PDF as malicious.

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=fundamentals+of+financial+management+concise+7th+edition+solution+manual+pdf
    • http://files.brightstarastro.com/uploads/1/3/1/8/131856492/8872450.pdf
    • http://bifuji.willowmoonministries.com/uploads/1/3/0/9/130969600/3228594.pdf
    • http://files.malcolmmacdonaldoutlawford.com/uploads/1/3/0/9/130968956/9fc45422.pdf
    • http://files.sunshinepeeking.com/uploads/1/3/0/7/130740165/muwotuwirupire_dulul.pdf
    • http://files.auntyjoys.com/uploads/1/3/1/1/131163996/8776608.pdf
    • https://cdn.shopify.com/s/files/1/0431/7147/9709/files/12428343807.pdf
    • https://cdn.shopify.com/s/files/1/0431/7518/2485/files/guidelines_for_bioavailability_and_bioequivalence_studies.pdf
    • https://cdn.shopify.com/s/files/1/0439/6656/2462/files/substitution_cipher_python.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3074/files/47134225158.pdf
    • https://cdn.shopify.com/s/files/1/0435/0840/0280/files/wd_my_cloud_mirror.pdf
    • https://cdn.shopify.com/s/files/1/0436/5264/5017/files/definition_of_social_responsibility.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/visewegiboximu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3776/9384/files/lobedegaguvod.pdf
    • https://cdn.shopify.com/s/files/1/0431/6512/2720/files/vosot.pdf
    • https://cdn.shopify.com/s/files/1/0437/5530/7159/files/family_tree_exercises_worksheet.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_off0000a113.bin
065bb8f4cf188516dae86812cddc795b150aade3d7b6faf8278096125fc2e9de
pdf-font-stream PDF embedded font (sfnt) at offset 0xA113 5508 bytes
font_01_sfnt_off0000b3b5.bin
46a19d6e9f6767c0c1d3b18f63c56087b25125ef1c692be7f1816d141fe76b91
pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B5 10556 bytes