Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb296134795d161…

MALICIOUS

PDF

41.9 KB Created: 2020-08-26 05:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca9128caf6ee3cf7af87b40b2d3282da SHA-1: 5e9ce9c209d7612e0035fede7cdc65d81cbd8b0d SHA-256: 1fb296134795d16120c923dd58693270b90ac60022b270b5a60a309ead8e8587
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.com, disguised as a movie download. The document body, though heavily obfuscated, contains the same lure text and URLs. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests SEO poisoning tactics to distribute the malicious PDF.

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=rockstar+full+hd+movie++1080p+filmyw
    • http://doziror.gypsyseeds.org/uploads/1/3/2/8/132814930/pabolobupi_bupixemorudo.pdf
    • http://files.rathfrilandmotorclub.co.uk/uploads/1/3/2/3/132302913/zomawuzivoludi_petusol_mufawukemur_xitedelufukojob.pdf
    • http://files.marfastudioarts.org/uploads/1/3/0/8/130874567/tizarexomusidul-sozopojer-gifasezakigix-bixofaredim.pdf
    • http://files.matomar.com/uploads/1/3/2/6/132695200/2618651.pdf
    • http://midekuv.diazpa.com/uploads/1/3/0/7/130775320/3025210.pdf
    • https://news.fresherslive.com/arti
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/95423313765.pdf
    • https://cdn.shopify.com/s/files/1/0431/6158/3776/files/big_ideas_math_red_answers_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/6663/0050/files/lend_vs_borrow.pdf
    • https://cdn.shopify.com/s/files/1/0438/7710/5832/files/ielts_writing_task_topics_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/puneson.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/64169537343.pdf
    • https://cdn.shopify.com/s/files/1/0436/9396/5466/files/android_tv_apps_development.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/91188514084.pdf
    • https://cdn.shopify.com/s/files/1/0436/0326/3645/files/lasoxijujonez.pdf
    • https://cdn.shopify.com/s/files/1/0429/9581/0455/files/54853850733.pdf
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/bkav_mien_phi.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_off00006164.bin
fdafb890c861fc1c03f6396f25754e915eaa47730650459ebb4ea42cd0bb2fd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6164 6108 bytes
font_01_sfnt_off00007624.bin
cd1ee56f1eb8d7154130d10544209848f296d9b857333e8888dce9e137e3353b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7624 10880 bytes