Malicious PDF — malware analysis report

Static analysis result for SHA-256 6001d8a377fa77c4…

MALICIOUS

PDF

42.2 KB Created: 2020-08-25 21:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6f917e44a6e7a1f0e48d427a6659816 SHA-1: 8733b057f0ef5fbe1acdc90e322d7cb0a0a14420 SHA-256: 6001d8a377fa77c47211a0a19e2f5a53726e53ade2d7876fac8ef1b38cd48e20
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains this malicious URL. This suggests a tactic of link farming or redirecting users to malicious sites, potentially for phishing or malware distribution.

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=partes+de+una+planta+de+emergencia
    • http://jozif.meltonscarpet.com/uploads/1/3/0/7/130776401/57388.pdf
    • http://repiwut.everlastingrockministries.org/uploads/1/3/2/3/132303079/7014336.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zorosibal.pdf
    • https://cdn.shopify.com/s/files/1/0435/1108/7259/files/clash_of_clans_apk_indir_son_srm.pdf
    • https://cdn.shopify.com/s/files/1/0440/1594/3845/files/sunfly_karaoke_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/6997/files/manualidades_material_reciclable_de_navidad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96328102714.pdf
    • https://cdn.shopify.com/s/files/1/0431/4382/3511/files/36838226461.pdf
    • https://cdn.shopify.com/s/files/1/0432/2911/8627/files/73065847165.pdf
    • https://cdn.shopify.com/s/files/1/0439/9264/5790/files/bungou_stray_dogs_mayoi_inu_kaikitan_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/7703/3372/files/82064361269.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/joxavanuve.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8918/files/tawakanuviso.pdf
    • https://cdn.shopify.com/s/files/1/0433/4092/3048/files/programmatically_annotate.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_off000066bd.bin
188897f0ca272e8e3bcb6c4c503b138b4b8f4456db5297eeb0a8902a0c3d9f4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x66BD 5392 bytes
font_01_sfnt_off000078f5.bin
e15e556d8d21e57017df42de600dc4cfe5555290495d0b43fd5d29a9195da065
pdf-font-stream PDF embedded font (sfnt) at offset 0x78F5 10828 bytes