Malicious PDF — malware analysis report

Static analysis result for SHA-256 159e366227aeb74b…

MALICIOUS

PDF

33.7 KB Created: 2020-08-31 02:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d0977fe5ad16457ae13741aee70db5d SHA-1: c517bbc74ae6a2b77bed9d9ac27087409e27ca97 SHA-256: 159e366227aeb74b8e2937d8f307dba4ef84007f32d02d8198f79f88ff3294c9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, disguised as a service manual download. The document body and embedded URLs suggest a link farm designed to drive traffic to malicious sites. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs indicate a potential for malicious redirection, likely leveraging JavaScript for execution.

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=cummins+m11+service+manual+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2925/0719/files/distilled_white_vinegar_msds_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4093/9933/files/mowezipamila.pdf
    • https://cdn.shopify.com/s/files/1/0431/6466/3967/files/booting_process_of_windows_7_step_by_step.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4171/files/zesarixodunugolip.pdf
    • https://cdn.shopify.com/s/files/1/0448/4520/3618/files/allah_names_with_meaning_and_benefits_in_urdu.pdf
    • https://static.usrfiles.com/ugd/097bd5_d5c3e5fd4e834faa96127508896e34a4.pdf
    • https://static.usrfiles.com/ugd/173616_e155d945a64e4ede95bbfbfe64f35d7c.pdf
    • https://static.usrfiles.com/ugd/f3cb45_ab1825191a7c4e99b1f18d5b535c5d25.pdf
    • https://static.usrfiles.com/ugd/b8c837_a234725131204072be73204f96052323.pdf
    • https://static.usrfiles.com/ugd/3aee12_31895a4941b64bb4a8ac88374598c869.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c0101b12be4433f90a782b02d807459.pdf
    • https://static.usrfiles.com/ugd/6a7407_b44324fc7bf046e08b9b9600b283f294.pdf
    • https://static.usrfiles.com/ugd/b85eb0_b35bbf27efcc4754aa59d0763f1ca76e.pdf
    • https://static.usrfiles.com/ugd/f65518_a9baa55948ea4da59fc16150f3bc16bd.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004796.bin
4b9b4e8d322cbe35997943b894187beb14c193bff858ab0417b8048f12162918
pdf-font-stream PDF embedded font (sfnt) at offset 0x4796 5276 bytes
font_01_sfnt_off00005982.bin
34e717ad1bd83a097ede9d5c597b6622d3684362bb5b3637d7a0649eefb75f39
pdf-font-stream PDF embedded font (sfnt) at offset 0x5982 9524 bytes