Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee3516716b1f342…

MALICIOUS

PDF

41.3 KB Created: 2020-08-09 12:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dececc17c98107a7bc34d8774fea40cf SHA-1: eae9a0139c0dcc28060408ac31c2604a28282da1 SHA-256: 8ee3516716b1f342b7d2190f00303787b9a79e79b3ffa9a8026dd4d47b857247
152 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one to a known malicious redirector at 'ttraff.com'. The document body text, though partially corrupted, suggests a lure related to 'Spanish conjugation verbs pdf'. The presence of a large number of external PDF links, many hosted on shopify.com, indicates a link farm strategy to potentially improve search engine ranking for malicious content or to distribute further malicious payloads.

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=spanish+conjugation+verbs+pdf
    • http://files.24millstillrd.com/uploads/1/3/1/4/131408183/1451047.pdf
    • http://files.eastsyracusefreelibrary.org/uploads/1/3/1/3/131398076/mebagumofuvemumewo.pdf
    • http://files.purebeautyphotography.com/uploads/1/3/1/3/131379042/kilaruwimavevis.pdf
    • https://cdn.shopify.com/s/files/1/0429/2725/9811/files/lutibopepajajekagotivuse.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/mabudaxem.pdf
    • https://cdn.shopify.com/s/files/1/0430/7052/1495/files/petuzinujuxosiviwojikafo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9799/0055/files/lojarixaxavagoji.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/workforce_planning_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/8737/9097/files/sipekipabuletomidijore.pdf
    • https://cdn.shopify.com/s/files/1/0448/4166/4669/files/vyond_character_creator.pdf
    • https://cdn.shopify.com/s/files/1/0436/4750/0448/files/gajinurijegaforomezoratu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/dukajodalamonewinimuviz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7258/4861/files/savelomuwosuvarilawobe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7093/7498/files/nukasimobaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/6599/9511/files/xajobipejugoliduza.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_off000064af.bin
e7d165931110c9ee43c1b3286300e91c7a52835c8673462d88ef4a6c5346830d
pdf-font-stream PDF embedded font (sfnt) at offset 0x64AF 5764 bytes
font_01_sfnt_off00007855.bin
849c99ece3ca3df6ab78a4d2b8b1b60cf07a9de587a569562f131a113885e905
pdf-font-stream PDF embedded font (sfnt) at offset 0x7855 9448 bytes