Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7d79df25c72f1e…

MALICIOUS

PDF

49.3 KB Created: 2020-08-21 15:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3790661e688b4e65609893d5fcbfa6a5 SHA-1: e29239d3f88e8bb467b56e75d49502389dee79ca SHA-256: de7d79df25c72f1ed2e75d6d21423fd83dcd99e37742135e6ecdda876b0ffc8e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to lead users to malicious content. The document body also contains numerous links to external PDFs hosted on Shopify, suggesting a link farm or redirection strategy. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or redirection attack.

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.ru/pify?keyword=beautiful+creatures+book+series+free
    • http://files.beyou.online/uploads/1/3/1/4/131482941/wuruzititupemus_gizifaxav_sizazud.pdf
    • http://files.thamilkdrop.com/uploads/1/3/1/4/131437295/xaguma_tulezamilubiso_kotule.pdf
    • http://files.sharonmaylinn.com/uploads/1/3/0/9/130969774/3376484.pdf
    • https://cdn.shopify.com/s/files/1/0431/8068/7524/files/wuvukulejoxarebopojuwi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0162/5252/files/nemubofafasazilubuxuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/0553/4620/files/casio_fx-_9750gii_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/3551/5290/files/gozovovixaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/74101404211.pdf
    • https://cdn.shopify.com/s/files/1/0438/1392/9122/files/numinodedefon.pdf
    • https://cdn.shopify.com/s/files/1/0434/3706/4344/files/limipegomokarazukibo.pdf
    • https://cdn.shopify.com/s/files/1/0444/6345/6423/files/javascript_interview_questions_and_answers_for_freshers.pdf
    • https://cdn.shopify.com/s/files/1/0434/6019/8557/files/11885823393.pdf
    • https://cdn.shopify.com/s/files/1/0429/9328/7321/files/kibesilive.pdf
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/marathi_opposite_words_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/0287/9387/files/cgst_act_2020_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/quantitative_ability_test.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_off000083f7.bin
e81759a21aef79d2b63b927b580b273cdbd8e757097ae6f73da753196465e621
pdf-font-stream PDF embedded font (sfnt) at offset 0x83F7 5128 bytes
font_01_sfnt_off00009572.bin
d42f83086cb2f1daf2f49d0ffef04a113da8f72665d8e7035b609fcf50fe929c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9572 10120 bytes