Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4802f8c4f7017fb…

MALICIOUS

PDF

47.6 KB Created: 2020-08-28 05:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8f5d9de415252078847f7cd1bdfb62d SHA-1: d6f4704e967558080aea321ba27dc5239389872b SHA-256: b4802f8c4f7017fb574a466ff8a99bd00790c0f042d19398b056fc76facd1007
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious PDF

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. It also exhibits a PDF link farm, with numerous links pointing to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the PDF is designed to redirect users to malicious sites or to participate in SEO manipulation for malicious purposes.

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.com/pify?keyword=tirade+de+l%2527hypocrisie+dom+juan
    • http://files.bridgestoserbia.com/uploads/1/3/1/4/131452991/7654863.pdf
    • http://jewudes.flowartspace.com/uploads/1/3/0/9/130969754/4333c2aca82bfe.pdf
    • http://jejej.mortgagenoteinvesting.info/uploads/1/3/2/3/132303027/4ef4745aa.pdf
    • http://files.sandrabekvalac.com/uploads/1/3/0/7/130740483/kuniwuxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2934/9030/files/53284065437.pdf
    • https://cdn.shopify.com/s/files/1/0430/7887/7337/files/fortnite_access_token.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/rimusufedi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8133/4935/files/eggs_benedict_nutrition_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/jujevufuvozu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/pulutasuza.pdf
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/archeology_of_knowledge.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28821374719.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/rhapsody_malt_wow.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7837/files/best_ayurvedic_medicine_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/hydraulic_valve_actuators.pdf
    • https://cdn.shopify.com/s/files/1/0428/6794/9724/files/79177650197.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3357/files/g._u._d._holdings_annual_report_2018.pdf
    • https://cdn.shopify.com/s/files/1/0462/5652/1367/files/91556214959.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_off00007a14.bin
f768867004a2889874e12a06868d042eca956876b635d696342fc17104942d61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A14 5476 bytes
font_01_sfnt_off00008c99.bin
9a55a9d1a53a313f62409396db6cc3b89aac588fd0f74876274f84fdc5214fad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C99 11924 bytes

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