Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a5cca7ef7e2ca3…

MALICIOUS

PDF

62.5 KB Created: 2020-11-02 01:04:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9be2768d90f6722625ac50ce1012811 SHA-1: d35eb8a81783b69ad413ee8f59678d9592664c0d SHA-256: 68a5cca7ef7e2ca3bac0467bf2baa52b95594d1381e2c1737a3ac6fe6caa26d6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a deceptive title and embeds multiple links, one of which, 'https://gettraff.ru/123?keyword=sec+swimming+championship+2020+results', is known to lead to malicious redirector infrastructure. The document also features a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness.

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://gettraff.ru/123?keyword=sec+swimming+championship+2020+results
    • https://newejata.weebly.com/uploads/1/3/3/9/133999860/xakomivimelax-waxebitilixab-xarolubigel.pdf
    • https://nidixinaxob.weebly.com/uploads/1/3/0/7/130739699/a3d909d232593.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c187d1bb-54eb-407c-9f95-b394cb48fb6b/48642608426.pdf
    • https://uploads.strikinglycdn.com/files/31c1de96-6ec3-4c23-a59a-d8a340259c77/jun_shik_kim_olympic_runner_true_sto.pdf
    • https://cdn.shopify.com/s/files/1/0430/4958/2743/files/65588973147.pdf
    • https://cdn.shopify.com/s/files/1/0266/8914/2968/files/xejavetiwetovafegagivu.pdf
    • https://s3.amazonaws.com/bokofapig/meet_local_women.pdf
    • https://uploads.strikinglycdn.com/files/0c4c94c6-184d-4f68-b7ed-1289b8adc222/99151814123.pdf
    • https://s3.amazonaws.com/fonazuzixagizir/avid_summer_institute_2020_dates.pdf
    • https://uploads.strikinglycdn.com/files/77764c45-1470-4fee-abcf-7654011d8c83/gigalagamuzuzaxanuderew.pdf
    • https://uploads.strikinglycdn.com/files/f3796bcd-ab47-45d0-9db4-277a85aa4ad2/rulewa.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_off0000b534.bin
f2e7462037eb80eaa59d0b088e9ef26eed85dac11dd29f4369b631d8e6f46e77
pdf-font-stream PDF embedded font (sfnt) at offset 0xB534 5816 bytes
font_01_sfnt_off0000c8e7.bin
95649c19d9eb417872e0bf66850670b8496235fc610d9583a042f7a05e3354ea
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E7 11024 bytes