Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dc1d8c2e126b7be…

MALICIOUS

PDF

44.9 KB Created: 2020-11-01 05:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53ffb2846c67f17f5629c98a9cdc567b SHA-1: 13f3cda6c06dae93cd690343e4daa2feed0ee4bb SHA-256: 8dc1d8c2e126b7be2594df3b67052d0a7c3593588a3887d2a5a081e2fb3bae61
94 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'https://gettraff.ru/aws?keyword=real+writing+with+readings+8th+edition+pdf'. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of malicious links within the document body suggests an attempt to lure the user to a compromised site, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/aws?keyword=real+writing+with+readings+8th+edition+pdf
    • https://cdn-cms.f-static.net/uploads/4381962/normal_5f92733f748a4.pdf
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5f8cbc744fec4.pdf
    • https://cdn-cms.f-static.net/uploads/4378404/normal_5f91db2c47d91.pdf
    • https://zuvagenujak.weebly.com/uploads/1/3/4/4/134454716/zetumevaworo-rusodokuzoj-wivumavunanew.pdf
    • https://cdn-cms.f-static.net/uploads/4403262/normal_5f96b5c23d70c.pdf
    • https://cdn-cms.f-static.net/uploads/4406202/normal_5f957c3623c31.pdf
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/fupipej-xekotumujupalu-mawejozujuk-digad.pdf
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/3251463.pdf
    • https://lilepixot.weebly.com/uploads/1/3/4/4/134462463/dabepefagezufab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xanebavifamopez/morapadejazisibilutaj.pdf
    • https://uploads.strikinglycdn.com/files/b44e2d56-0bb4-4c12-8a2e-ac9f72b7c928/we_ve_only_just_begun_chords.pdf
    • https://s3.amazonaws.com/turip/kurikapujukasaris.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6119/files/ponajanesomozigedog.pdf
    • https://cdn.shopify.com/s/files/1/0486/8256/5782/files/remadujuxotilutopapale.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000673a.bin
f1383d7cd59a6739427f7596f1165603adacbacc8f657d4e156367611f565abb
pdf-font-stream PDF embedded font (sfnt) at offset 0x673A 2828 bytes
font_01_sfnt_off00007143.bin
365f248b64f3dc499240842c0df099595870ba9a8fcf3fdb3de674d934347e0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7143 5596 bytes
font_02_sfnt_off0000845e.bin
431b8b2556174460f3f13310cf0d2681a04750636147afa6eeabb7783244d196
pdf-font-stream PDF embedded font (sfnt) at offset 0x845E 9964 bytes