Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fba7b8692cfc366…

MALICIOUS

PDF

42.8 KB Created: 2020-08-31 18:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35399868d58d116da84a01b1a0688586 SHA-1: af487a55c13437a676af28ededf8b9e8cc35a052 SHA-256: 7fba7b8692cfc3664983d2586e98662f75a185a9b7c42ee485e12692e810f5fa
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, ttraff.com, disguised as a search result. This suggests an attempt to direct users to malicious content or phishing pages. The PDF also functions as a link farm, pointing to numerous other PDFs, likely for SEO manipulation or to spread malicious links further. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

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/wix?keyword=green+leaf+background+hd+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/c63dba_97949ad46fe94995b53d00a7a904c903.pdf
    • https://static.usrfiles.com/ugd/47b1e8_5a761281427c44a2a4f5ea64e567f540.pdf
    • https://static.usrfiles.com/ugd/87fdc7_4598fa4544614dfbb1594d31e3c498db.pdf
    • https://static.usrfiles.com/ugd/b8c837_570def4cd44b4f70a49af5a8ff07f404.pdf
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/navuwobavabumim.pdf
    • https://cdn.shopify.com/s/files/1/0434/8506/9478/files/biozone_aqa_biology_workbook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/0560/7070/files/7527239632.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/lozopidivadorizorega.pdf
    • https://cdn.shopify.com/s/files/1/0459/6698/3335/files/saziguxizadobagadiko.pdf
    • https://cdn.shopify.com/s/files/1/0465/8318/5575/files/ramizegasoworijuvasabuxek.pdf
    • https://cdn.shopify.com/s/files/1/0437/4131/5223/files/encyclopedie_des_plantes_mdicinales.pdf
    • https://cdn.shopify.com/s/files/1/0461/9013/3406/files/plano_cartesiano_y_sus_partes.pdf
    • https://static.usrfiles.com/ugd/cf79db_26191400c2ec4f128faff947d040ac9e.pdf
    • https://static.usrfiles.com/ugd/3bca44_80f82e42d1fd477ea6df85034d40bf3b.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_858dc107634d48249143c223c8cd2d54.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_off000058ab.bin
8aa1df0fed9817580455700989871d41566ac2c621c52d0e7b2b9f0a2424bb4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58AB 5092 bytes
font_01_sfnt_off000069f0.bin
7f4789db7992ce18cbdd5d08a6ea86f431f082276ce880b9bb4fd0ddd045c4d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69F0 12184 bytes
font_02_sfnt_off0000904f.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x904F 4324 bytes

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