Malicious PDF — malware analysis report

Static analysis result for SHA-256 103d2a086a88ef4a…

MALICIOUS

PDF

45.8 KB Created: 2020-08-08 17:40:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e3ebc7f8686fa596f07936e5ea6cbb0 SHA-1: c1b3f7d5040d332d1ca2a12f72d241ec9d0e6e03 SHA-256: 103d2a086a88ef4a17fd9a2f88f3d93df8145c07ba8ac190156ebe03b6beb445
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=dda+line+algorithm+in+computer+graphics+pdf
    • http://files.cooliecollection.com/uploads/1/3/0/8/130874109/jubaditigawu.pdf
    • http://files.mcminnvilleaircraftmodelers.com/uploads/1/3/2/7/132712043/mejine_rogozadet.pdf
    • http://files.marylandrealestatewholesalers.com/uploads/1/3/2/6/132681308/7013423.pdf
    • http://wusud.madrivergarlicgrowers.com/uploads/1/3/1/4/131406717/6693477.pdf
    • http://files.bebrightfitness.com/uploads/1/3/2/6/132683168/144276.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5393/0901/files/bangla_history_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2264/files/gupugefitimel.pdf
    • https://cdn.shopify.com/s/files/1/0434/0439/4661/files/sikajulab.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/weekly_job_newspaper_bd.pdf
    • https://cdn.shopify.com/s/files/1/0438/3123/0624/files/chrono_cross_trap_guide.pdf
    • https://cdn.shopify.com/s/files/1/0450/4656/2966/files/precalculus_with_limits_3e_chapter_7.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2339/files/lemebatorir.pdf
    • https://cdn.shopify.com/s/files/1/0432/0736/0667/files/piwug.pdf
    • https://cdn.shopify.com/s/files/1/0435/6338/4991/files/sobejukeg.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/88383528410.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lajuvifubukakevo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7639/4901/files/nedotoja.pdf
    • https://cdn.shopify.com/s/files/1/0432/7525/5972/files/nilinorizigufawem.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_off00006a26.bin
7478c91f55bad9ba5c007eddaab5bff94d216daa7d7122a5fe1f6b3b6d129750		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A26 5568 bytes
font_01_sfnt_off00007cf2.bin
db37e4440e5437a212e73eca1f105a1f44284d7e3bdf0ffc6ccfa876bde40152		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF2 13988 bytes

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