Malicious PDF — malware analysis report

Static analysis result for SHA-256 1259c49e7989cd08…

MALICIOUS

PDF

47.1 KB Created: 2020-08-14 07:22:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cadec3a353c01bd6db2ef353798c837 SHA-1: 6cf473a430e8d5dd4d34f6bb29eee159aff4ca38 SHA-256: 1259c49e7989cd08b4bd9630feaa4d992fdc80bcb9782fc3d9c482f67a17984f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL associated with a redirector service. The document body, though partially corrupted, contains text related to 'scholarship essay pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous links to other PDFs, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to increase visibility.

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=how+to+write+scholarship+essay+pdf
    • http://files.todayhousing.com/uploads/1/3/0/7/130739043/nepisad.pdf
    • http://vinulivon.ghanaface.com/uploads/1/3/1/0/131070867/vajagifamo_jokenureke_livetemoriwar_jakomuf.pdf
    • http://balosav.harrywaltherband.net/uploads/1/3/1/3/131398091/puxamolaxuvedaxorufa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/71179538539.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9873/files/74841784254.pdf
    • https://cdn.shopify.com/s/files/1/0437/0599/1322/files/58659766580.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/25834601431.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6705/files/39476492291.pdf
    • https://cdn.shopify.com/s/files/1/0428/5949/5590/files/1069710416.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/mass_gain_workout_routine.pdf
    • https://cdn.shopify.com/s/files/1/0428/4642/1158/files/beyond_meat_ipo_performance.pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7575/files/kissanime_garden_of_words.pdf
    • https://cdn.shopify.com/s/files/1/0451/1966/8377/files/52996201536.pdf
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/options_futures_and_other_derivatives.pdf
    • https://cdn.shopify.com/s/files/1/0435/5814/2120/files/methanol_water_distillation_column_design.pdf
    • https://cdn.shopify.com/s/files/1/0437/0956/3034/files/evermore_alyson_noel_english.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_off00007a35.bin
85d13f8880f6053079562d50f75860fcd07fce2b46af26350e2ea9563d4df276		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A35 5396 bytes
font_01_sfnt_off00008ca4.bin
0eb3a754d379529c8df0ee5790c6fda341663c1fbdbde1f8dfcf233b82767347		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA4 10204 bytes

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