Malicious PDF — malware analysis report

Static analysis result for SHA-256 b26632a5fa77ab98…

MALICIOUS

PDF

45.8 KB Created: 2020-08-05 17:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 182e3fab046a5c127fa9f48b29094e4c SHA-1: 3960ef66aa2d702ffd0dbc9bc74d45e84af14064 SHA-256: b26632a5fa77ab988b343cd1698c7871750693f9e47212b25e0b3a998833e66d
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector infrastructure at `https://ttraff.com/pify?keyword=breakup+books+pdf`. Another heuristic detected a large number of external PDF links, many hosted on `cdn.shopify.com`, suggesting a potential SEO manipulation or link farm tactic. The document body contains garbled text but includes the same URLs, reinforcing their presence as a core part of the document's content.

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=breakup+books+pdf
    • http://files.oldfieldfarmhorseandhome.com/uploads/1/3/2/3/132302833/reperiromopi.pdf
    • http://tapar.paulaspatch.com/uploads/1/3/0/8/130874207/jokopojunuxax.pdf
    • http://files.jfkwrites.com/uploads/1/3/1/4/131453111/gakan-bokidusuv.pdf
    • http://files.perciapiercestories.com/uploads/1/3/0/8/130814831/9389782.pdf
    • http://files.dockyardtoolsusa.com/uploads/1/3/1/4/131437873/f339108ed323.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/70032598262.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/tukakogugiju.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/xatubizikovevizilanoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2688/2471/files/2218590699.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/tutorial_opencv_python.pdf
    • https://cdn.shopify.com/s/files/1/0438/5649/4757/files/36218188529.pdf
    • https://cdn.shopify.com/s/files/1/0434/3247/6838/files/horaire_ligne_2_alterneo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9343/3246/files/john_deere_l118_parts.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/cashflow_game_card.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/pigawozalubukuren.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/davinidepitatomunoverut.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9927/files/priscilla_shirer_gideon.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000699a.bin
97d84bbaca15b94d89281affbe424b6b03804155ab945f851346a46eb8fe4675		 pdf-font-stream PDF embedded font (sfnt) at offset 0x699A 4904 bytes
font_01_sfnt_off00007a4a.bin
77f89239794665ae1fb2467b6fd91dc4f6c119efb487970efa15d07c124c119b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4A 9952 bytes
font_02_sfnt_off00009c7b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C7B 4324 bytes

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