Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d8063a482af209a…

MALICIOUS

PDF

42.9 KB Created: 2020-08-21 16:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7a0d0faf4dae8038dbb10fe1a63e36b SHA-1: af1587b0a6e4fae9f3e290f3784b101f4c93016a SHA-256: 7d8063a482af209ad8de6bb70f5ac884caa19862598123e997a6499273e743d4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, includes the same URL, suggesting an attempt to trick users into clicking it. The presence of numerous other PDF links, many hosted on Shopify, further indicates a link farm or redirection scheme designed to lead users to malicious 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=manager+performance+appraisal+form+template
    • http://files.katemathiasauthor.com/uploads/1/3/0/9/130970004/xujepuzubefonaw_jalele_nowujijudage_jufibubebiju.pdf
    • http://files.saltwaterstatecollege.com/uploads/1/3/1/4/131408970/joril.pdf
    • http://files.mayaannaphotography.com/uploads/1/3/0/7/130739718/7410541.pdf
    • http://butozozu.soulhealthservices.com.au/uploads/1/3/1/8/131856907/sexujevirudazarojeva.pdf
    • http://files.geraldinepilgrim.com/uploads/1/3/2/8/132815346/6780435.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4590/3774/files/27701420003.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7577/files/ko_bushiri_song.pdf
    • https://cdn.shopify.com/s/files/1/0437/9449/7698/files/rezajolixaxuposaxewaresef.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2891/files/aap_anxiety_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0437/5900/9943/files/ekvillian_songs_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/2734/7109/files/dozufadujiresakukeror.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/99923908943.pdf
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/keneteref.pdf
    • https://cdn.shopify.com/s/files/1/0429/1647/9132/files/movezuwagezo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7777/9100/files/63098992272.pdf
    • https://cdn.shopify.com/s/files/1/0435/4244/6231/files/figure_caption_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/0710/6462/files/38789182546.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_off000069bc.bin
c43642d84c4c551b77d4bdff31124c0e587216336096ae01ecd00325f68cb7d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69BC 5340 bytes
font_01_sfnt_off00007bda.bin
ddd3cc2b2753d9669491574a325c26ae6a97e882ea800501dd6771c3588c9b13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDA 10184 bytes

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