Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0dad525d512df2…

MALICIOUS

PDF

42.5 KB Created: 2020-08-31 06:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 217e7feab134e68e754a2aa1d99650cd SHA-1: b8aacb14ed71313bc355a0af75a514a7607d305b SHA-256: be0dad525d512df2578cfc0959db0be353b4f75891613c7a9d0f6be713a1b4e4
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, another critical heuristic indicates a PDF link farm, with the primary link also leading to a suspicious redirector. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of these malicious links suggests the document's primary purpose is to redirect users to a harmful site, likely for phishing or malware delivery.

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/wix?keyword=ejercicios+integrales+trigonometricas
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/2835513585.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4261/files/tv_guide_listings_san_antonio.pdf
    • https://cdn.shopify.com/s/files/1/0436/9196/6617/files/vidupolunirepadidagu.pdf
    • https://cdn.shopify.com/s/files/1/0441/2047/3752/files/amazon_alexa_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/8774/1607/files/42299881042.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tuwaz.pdf
    • https://cdn.shopify.com/s/files/1/0436/6699/7398/files/pujevekaberufulemuwupadi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6550/0060/files/87100097504.pdf
    • https://cdn.shopify.com/s/files/1/0463/1743/7088/files/milwaukee_circular_saw_edge_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/minecraft_jail_escape.pdf
    • https://cdn.shopify.com/s/files/1/0434/7668/0869/files/5802787686.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005848.bin
9b1169952bfa901c5a2375daac2563fa0902b6bff25dafd9eab5f91a08a1a3f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5848 4940 bytes
font_01_sfnt_off000068fb.bin
7025e0d4519c61141a346068274e2893e36896cc71058b4eb7f2c83fae842754
pdf-font-stream PDF embedded font (sfnt) at offset 0x68FB 11432 bytes
font_02_sfnt_off00008d94.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D94 4324 bytes