Malicious PDF — malware analysis report

Static analysis result for SHA-256 652dad6344754020…

MALICIOUS

PDF

44.6 KB Created: 2020-08-28 02:26:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca4509fea4592974a1ec0b1d47e69546 SHA-1: c9bcc5937b8670382341afabb27e79cf85f63bae SHA-256: 652dad6344754020122c4d5f51f5086e39db305e2e773431dd2992d7380e19dd
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple external PDF files, with one primary link to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the primary malicious URL, suggesting the intent is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

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.com/pify?keyword=anatomia+de+la+via+biliar
    • http://files.villagestwo.com/uploads/1/3/2/7/132740462/0163c.pdf
    • http://tejebuv.gregorywsaxton.com/uploads/1/3/1/4/131438309/ronon.pdf
    • http://files.deafplanetsoul.org/uploads/1/3/0/9/130969873/mumonu_nuwin_zojemedituwuwo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/5064/7204/files/lejefutajapeladuzabelebi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/jojosemafepuneziwovo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4228/2399/files/systolic_pressure_variation.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/mixing_audio.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/sql_workbench.pdf
    • https://cdn.shopify.com/s/files/1/0433/9122/1923/files/87555111133.pdf
    • https://cdn.shopify.com/s/files/1/0462/2876/6871/files/4387041390.pdf
    • https://cdn.shopify.com/s/files/1/0440/4061/8134/files/mba_tecnologia_da_informao_ead.pdf
    • https://cdn.shopify.com/s/files/1/0440/4841/6933/files/kathi_movie_bgm_remix.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_off0000622d.bin
93892d61e891f9e22c7795195a751a8a66f6c578d2b87fd9d1a67c33e61cd549
pdf-font-stream PDF embedded font (sfnt) at offset 0x622D 4768 bytes
font_01_sfnt_off0000723c.bin
bbc812f45882ddfadd6e22d4b4a969dc29bc38ee39c7fa63353dc5501d196afc
pdf-font-stream PDF embedded font (sfnt) at offset 0x723C 11052 bytes
font_02_sfnt_off00009609.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9609 4324 bytes