Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb54cb217f11175…

MALICIOUS

PDF

41.3 KB Created: 2020-08-13 21:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1fa7c5233bca7d3756d4961decd9917 SHA-1: 06d3b0cca833c047a76a3d046ae971a21ab1da2c SHA-256: 1eb54cb217f11175fb6b14dc37345aafaf062b203541e2d12134629a95f1742c
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link redirects to `ttraff.ru`. This redirector is associated with malicious activity, suggesting a phishing or malware distribution attempt. The ML classifier strongly supports the malicious verdict.

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=acrobat+pdf+reader+and+editor
    • http://files.ashleykelley.com/uploads/1/3/1/6/131606890/3767267.pdf
    • http://files.diymandalastones.com/uploads/1/3/1/4/131454024/dixedizun-nilig-xipulalokuwat.pdf
    • http://files.bobbyhyam.com/uploads/1/3/0/7/130738894/597cebf18.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6558/files/dufovosawumi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/45770505019.pdf
    • https://cdn.shopify.com/s/files/1/0438/6163/9318/files/vosamiwuzuga.pdf
    • https://cdn.shopify.com/s/files/1/0440/6178/6262/files/types_of_bucket_elevator.pdf
    • https://cdn.shopify.com/s/files/1/0427/4143/2487/files/wizorovabesopigu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/garul.pdf
    • https://cdn.shopify.com/s/files/1/0433/4541/2254/files/cell_organelle_crossword_puzzle_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37357510366.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6070/files/applied_asymptotic_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bodadajigewodozisidezufe.pdf
    • https://cdn.shopify.com/s/files/1/0435/7482/1019/files/mercedes_skill_build.pdf
    • https://cdn.shopify.com/s/files/1/0428/6968/6431/files/introductory_and_intermediate_algebra_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/0046/1474/files/84863077850.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_off000060f8.bin
f62b7249b8e01f76b96411a03304b00bf0cc60b73e95bae1689ca4445067a5aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x60F8 5068 bytes
font_01_sfnt_off0000723c.bin
d46600bb768f7e2929e79a0933d95f0ae276f16705c27c1b0d9cbc5c7d2ab242
pdf-font-stream PDF embedded font (sfnt) at offset 0x723C 12308 bytes