Malicious PDF — malware analysis report

Static analysis result for SHA-256 68788100fa8c96e1…

MALICIOUS

PDF

45.0 KB Created: 2020-08-14 12:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaa7e92ed045dbe5afe090f47fe52ccd SHA-1: 9780647af73a049765b99a5ce167fbfa5a1b15cf SHA-256: 68788100fa8c96e18afa0c932d92f5b523328623ae51eed1a0c7a530e9f85d28
154 Risk Score

Malware Insights

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

The PDF contains a link to a malicious redirector, ttraff.ru, which is likely used to obscure the final destination of the malicious content. The document also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports this assessment.

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=biugo+video+maker
    • http://files.superdogdoodles.com/uploads/1/3/1/3/131398533/pavonaj-xelubo.pdf
    • http://files.abundanceworldwide.org/uploads/1/3/1/4/131483279/pazozemexijejavuwilu.pdf
    • http://files.unorthodoxphilanthropy.org/uploads/1/3/1/8/131872079/fc8b4ce6cf.pdf
    • http://xazura.nplwest.com/uploads/1/3/0/8/130814328/fizotoxizonuse.pdf
    • http://files.petermiyamoto.com/uploads/1/3/1/4/131453252/20c293da8e24.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/87743122224.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/75738496150.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/94324104466.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/fupesojupevikugipit.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2518/files/bonum_est_confidere_spartito.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9861/files/church_of_christ_bible_study_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/gigaxosemiwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/7532/9441/files/diablo_2_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0430/1216/1685/files/honeywell_th8321r1001_installation_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9752/2329/files/34493122133.pdf
    • https://cdn.shopify.com/s/files/1/0437/7464/0286/files/tupeteguguwudowefogupemup.pdf
    • https://cdn.shopify.com/s/files/1/0434/1674/8188/files/arabic_hebrew_dictionary.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_off00005832.bin
b5763e2573fa161e0aa014c92878aec52aa61b397890e8d909712293d05b1f8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5832 5108 bytes
font_01_sfnt_off0000697e.bin
ecd9ca3c9dc3f44982b631c3758a4c09ac5f21827cbfad791582ef4a08fe5959		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697E 6948 bytes
font_02_sfnt_off00008223.bin
dde94b3b0790ce4ecda99a645ab34b74a61162ee47f9fde8b3d2b2c33fe18475		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8223 10364 bytes

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