Malicious PDF — malware analysis report

Static analysis result for SHA-256 a90229e090b535ad…

MALICIOUS

PDF

41.0 KB Created: 2020-08-22 16:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19f27a68b71e41a92f91000c1b504f84 SHA-1: b6d840d206dd2d8d70fdf2b5028af487ac9124ca SHA-256: a90229e090b535adaf2427bb598c0b2ce528a88fd9472be8ad74010b2548802b
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). The document body, though heavily obfuscated, contains the same malicious URL. This suggests a phishing or scam attempt using a link farm to obscure the malicious destination.

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=cara+membuat+cv+di+word+android
    • http://wiril.intermezzogallery.com/uploads/1/3/1/4/131483400/wafozaluboninij.pdf
    • http://files.gemalchemy.com/uploads/1/3/0/8/130813667/dogozinoziwik-pewim-nefovunesolin-betujiw.pdf
    • https://cdn.shopify.com/s/files/1/0436/0739/2413/files/tell_me_about_yourself_interview_question_best_answer.pdf
    • https://cdn.shopify.com/s/files/1/0430/1016/2837/files/bidabe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1120/files/xeduziluguzurekadav.pdf
    • https://cdn.shopify.com/s/files/1/0445/3246/5828/files/guia_turismo_bogota.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/sodexekix.pdf
    • https://cdn.shopify.com/s/files/1/0433/5743/8101/files/us_constitution_amendments_full_text.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/xesiwor.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/tefokorotuduba.pdf
    • https://cdn.shopify.com/s/files/1/0429/8961/7311/files/bibemugojafivedexepoxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1558/5448/files/46449444145.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_off0000639c.bin
ef2aaa61aa5aeec70014b118d7dfee44d919e0f630401567bd58e567d7ea3923
pdf-font-stream PDF embedded font (sfnt) at offset 0x639C 5072 bytes
font_01_sfnt_off000074d8.bin
15826a17912eb5b862481af6bc1ad8f1b8514a690c157d5f35c7ae0a7157fd3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x74D8 10092 bytes