Malicious PDF — malware analysis report

Static analysis result for SHA-256 474a0bceec035a72…

MALICIOUS

PDF

50.2 KB Created: 2020-08-08 19:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ceec8037ed35fde83b1f23c765d34272 SHA-1: bffd716798c764b18601140d31fb9b4840758761 SHA-256: 474a0bceec035a724b110814adfd780f3339530da8996359f793764ff8a729d6
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to shopify.com domains, but one critical link directs to `ttraff.ru`, which is flagged as a malicious redirector. This suggests a link farm strategy to obscure the ultimate destination, likely a phishing page or malware download. The ML classifier also strongly indicated maliciousness.

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=bouwbesluit+praktijk+pdf
    • http://files.orderdipped.com/uploads/1/3/2/6/132695418/22435.pdf
    • http://files.exoticfashion.online/uploads/1/3/0/9/130969278/sidajezuxe.pdf
    • http://files.illuminatingideas.org/uploads/1/3/1/4/131438823/tasexogejotemod_safutedapewano.pdf
    • https://cdn.shopify.com/s/files/1/0432/6414/7609/files/todivarusajoretivageg.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7254/files/descargar_chaotic_sword_god.pdf
    • https://cdn.shopify.com/s/files/1/0430/9526/1348/files/81546123198.pdf
    • https://cdn.shopify.com/s/files/1/0435/1354/4863/files/52254498603.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/dora_the_explorer_backpack_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1906/files/aniara_book_english.pdf
    • https://cdn.shopify.com/s/files/1/0436/0686/8126/files/anemia_por_deficiencia_de_acido_folico_y_vitamina_b12.pdf
    • https://cdn.shopify.com/s/files/1/0436/6653/8649/files/97069165473.pdf
    • https://cdn.shopify.com/s/files/1/0449/0670/9159/files/iodine_value.pdf
    • https://cdn.shopify.com/s/files/1/0437/6435/1130/files/28724464559.pdf
    • https://cdn.shopify.com/s/files/1/0448/0565/2637/files/agile_bertrand_meyer.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/ignou_assignment_first_page_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/bernoulli_s_theorem_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/88881013686.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_off00008a0c.bin
49a30e12c8d64c16fe3f8fc270edb3290a776d9215e38327af78d87312d3aad7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0C 5456 bytes
font_01_sfnt_off00009cb6.bin
943f9e813b5d1631901ac29cca2df83ce0e35b32a7c68006cc614749eca961b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB6 9052 bytes

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