Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ae653147e04e2a…

MALICIOUS

PDF

48.3 KB Created: 2020-08-12 20:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbe179c5b91d90ba1e279d2c2165152c SHA-1: 23988a7aa49b25975bb7678e1a3fba4eecf9961c SHA-256: 14ae653147e04e2a5f330881aca0f598071956cee20befbc4e89d459a3fd8e3c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, including one pointing to a known malicious redirector infrastructure at `ttraff.ru`. The document body, though partially corrupted, suggests a lure for downloading free Acrobat PDF software, which is a common tactic for distributing malware. The high ML classifier score and the presence of a link farm further support its malicious nature.

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=acrobat+pdf+free+download+for+windows+8
    • http://pevavod.ror-n.org/uploads/1/3/1/8/131871478/5883907.pdf
    • http://duxane.tourputtingcoach.com/uploads/1/3/1/1/131163635/fc7ce841d3317.pdf
    • http://files.janetcrane.com/uploads/1/3/1/4/131406390/9090026.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tifomev.pdf
    • https://cdn.shopify.com/s/files/1/0431/7564/1247/files/xaxunazidakedotibenifede.pdf
    • https://cdn.shopify.com/s/files/1/0437/7539/3944/files/how_to_download_vimeo_videos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mafimovudowejiner.pdf
    • https://cdn.shopify.com/s/files/1/0431/1495/4908/files/ximikuxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/zazofarodurivejovalewonot.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/98897832742.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/23470666773.pdf
    • https://cdn.shopify.com/s/files/1/0434/0544/3237/files/bigaxonulabepogowux.pdf
    • https://cdn.shopify.com/s/files/1/0432/8243/2160/files/11450901601.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/photography_company_profile_sample.pdf
    • https://cdn.shopify.com/s/files/1/0430/0341/2633/files/maxiwezixavexepajolise.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070f1.bin
1f3261a993ab477aaaa99a50f18e60a1a14badd43da0e7e6bc8e56caf24c3130		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F1 5352 bytes
font_01_sfnt_off00008330.bin
c4a72d36bbdd2dff05dc835128e81694768a08556133e97bb8e97a60743dc184		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8330 10128 bytes
font_02_sfnt_off0000a5e0.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5E0 4324 bytes

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