Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1fa318a05168f54…

MALICIOUS

PDF

46.9 KB Created: 2020-08-21 09:14:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de713a680c676aa2b36a5ee426baf406 SHA-1: 5de0e0057556093dd6875b348ac6e784ffb337e2 SHA-256: a1fa318a05168f54df12013f03c781928481b8349a674bb387b98d5bd9c83d39
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains text related to 'sentencing guidelines council fraud by false representation' and the malicious redirector URL, indicating a lure for fraudulent activity.

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=sentencing+guidelines+council+fraud+by+false+representation
    • http://files.peterandrewsoam.com/uploads/1/3/0/8/130874554/ba373da.pdf
    • http://debifeno.weberwaverlywatermainproject.org/uploads/1/3/1/4/131438416/xorap_mekelumogorub_fosisarag.pdf
    • http://vugowuwev.brand825.com/uploads/1/3/0/9/130969723/9c4ae76c6abd779.pdf
    • http://juvukuge.lancergrad.com/uploads/1/3/0/8/130874153/8ef07d6f505.pdf
    • https://cdn.shopify.com/s/files/1/0434/0147/8300/files/budaxojoxozux.pdf
    • https://cdn.shopify.com/s/files/1/0439/0918/5691/files/insinkerator_badger_5_manual.pdf
    • https://cdn.shopify.com/s/files/1/0452/4926/5826/files/shopee_apk_terbaru.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/rosobaxuzuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/23159672565.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/guitar_chords_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0440/8636/2264/files/ms_publisher_tri_fold_brochure_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/atividades_de_analise_combinatoria.pdf
    • https://cdn.shopify.com/s/files/1/0438/6694/7744/files/70548933662.pdf
    • https://cdn.shopify.com/s/files/1/0434/0826/1276/files/malaria_prophylaxis_guidelines_nepal.pdf
    • https://cdn.shopify.com/s/files/1/0440/2321/8341/files/youth_soccer_fitness_training_program.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/aptitude_test_questions_answers_toyota.pdf
    • https://cdn.shopify.com/s/files/1/0437/2581/5959/files/vagelakozokagojopebum.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/93681431196.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077c4.bin
0408b0d002715497634fe2ce2ef1d918277199b700118703ded602fc50bea6d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C4 5668 bytes
font_01_sfnt_off00008b23.bin
2b00df105ca4ba689de58e45d4b6f68f2064b95662098fdecf9ffa0a5a88238c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B23 10292 bytes

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