Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3feb64a4f2db02d…

MALICIOUS

PDF

35.1 KB Created: 2020-08-09 09:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19b17ceff1420e072089bc782198955f SHA-1: 2340170afb78f444265fab377d62d8c2124a88df SHA-256: b3feb64a4f2db02ddae8c426eb1a22ccc99557131f56b42d1550df60100632a6
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, a common tactic for SEO poisoning or distributing malicious content. One of these links, 'https://ttraff.com/pify?keyword=functional+occlusion+peter+dawson+pdf', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack pattern involves luring the user to click on a malicious link.

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=functional+occlusion+peter+dawson+pdf
    • http://files.manfredjantzen.com/uploads/1/3/1/3/131383921/rawij.pdf
    • http://files.elginparkathletics.com/uploads/1/3/1/4/131406413/xikudenaw.pdf
    • http://files.informixcommunity.com/uploads/1/3/1/0/131071240/kuzipabusowegibug.pdf
    • http://files.mellamarministries.com/uploads/1/3/1/0/131070938/74072cb.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/abbyy_transformer_12._0_serial.pdf
    • https://cdn.shopify.com/s/files/1/0432/1250/5243/files/jumemivabekonixijasukuza.pdf
    • https://cdn.shopify.com/s/files/1/0435/7593/5134/files/fusionner_2_documents_en_ligne.pdf
    • https://cdn.shopify.com/s/files/1/0441/2276/7512/files/beer_style_descriptions.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/futilobodilewojowivu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/ti_84_plus_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/6568/8743/files/zelodigibozuzegada.pdf
    • https://cdn.shopify.com/s/files/1/0429/4351/2732/files/bonney_forge_weldolet.pdf
    • https://cdn.shopify.com/s/files/1/0429/7742/7609/files/xabazeg.pdf
    • https://cdn.shopify.com/s/files/1/0440/8547/7541/files/70925785866.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2613/files/kusaderivoxagaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3818/7413/files/bulletproof_shopping_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0269/files/mp_map_full_size.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/71794471591.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3733/files/bupesikizapavux.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_off00004ce6.bin
5b1c18fedb3dea3157dbe9689af91dacb1b13f78ab31ced753c6b220706fad37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CE6 5196 bytes
font_01_sfnt_off00005eb6.bin
882ee7fe551467af9e4fd5df855fdc96bed9062fe9932a3fadc9b7b32fb8d38e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB6 9588 bytes

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