Malicious PDF — malware analysis report

Static analysis result for SHA-256 7083a18aac5d6877…

MALICIOUS

PDF

34.9 KB Created: 2020-08-24 09:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0aad1fda5248b1c9d7302ea19eb8d5be SHA-1: 692c8645d4b8ff82a8fb982c16c86455ac9c6906 SHA-256: 7083a18aac5d68777fc20e1337b56514a82c0aa1c99dd6cbff8595b1a4e8011f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to lure users into clicking potentially harmful links. The presence of a large number of external PDF links further indicates a link farm or SEO spamming attempt, likely to drive traffic to malicious sites.

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=letter+of+authorization+starhub+template
    • http://noluwew.pulsearts.org/uploads/1/3/1/0/131070420/gukiluku.pdf
    • http://files.franciscanyon.com/uploads/1/3/1/4/131408103/wutidemufewoses-wijirozifawa-pemos-gavofax.pdf
    • http://tonow.oldschoolsailing.com/uploads/1/3/1/6/131606295/zonijitekojo_xasonitamet_gilapuzenilekev_muraf.pdf
    • http://files.pmcpaintingscom.com/uploads/1/3/1/3/131379671/4810610.pdf
    • http://tiwegikav.frankkennedy.org/uploads/1/3/0/7/130776699/tudamijo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/allen_bradley_plc_programming_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dovaxetudomorunuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/4066/9849/files/zisavejamagixigewis.pdf
    • https://cdn.shopify.com/s/files/1/0440/7217/3733/files/british_council_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0437/2869/9553/files/antimicrobial_activity_of_essential_oils_and_other_plant_extracts.pdf
    • https://cdn.shopify.com/s/files/1/0434/7261/7637/files/convertible_dress_style_guide.pdf
    • https://cdn.shopify.com/s/files/1/0451/6010/4090/files/dusekegi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4492/8674/files/16801501681.pdf
    • https://cdn.shopify.com/s/files/1/0434/4548/5725/files/73875750347.pdf
    • https://cdn.shopify.com/s/files/1/0438/1461/7245/files/lubupodesuwojekobak.pdf
    • https://cdn.shopify.com/s/files/1/0431/6577/8076/files/58156583057.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048b5.bin
c79bd1bf908f650c0d058b6183e5d4a8db2ca4d3ae341ea4aaf34529564806ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48B5 5272 bytes
font_01_sfnt_off00005a80.bin
51416fc94f3ce266559bfde13ec6b03ed5097c4be713d5b9f852d4ebd014c9d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A80 10528 bytes

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