Malicious PDF — malware analysis report

Static analysis result for SHA-256 041720e619c62168…

MALICIOUS

PDF

45.7 KB Created: 2020-08-05 05:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50452892debe0f2305adcad68117e44f SHA-1: a1de614f991c8a4c625f4b291c341760b5655e23 SHA-256: 041720e619c6216833b3f52cfb51bd08fec8644988f02d4f7a11873b387b123c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many of which point to a redirector service known for malicious activity. The document body, though partially corrupted, contains text related to 'product business plan examples pdf' and a URL that appears to be part of a link farm designed to attract traffic. 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.ru/pify?keyword=product+business+plan+examples+pdf
    • http://files.katiebethart.co.uk/uploads/1/3/1/4/131409037/eeffeff.pdf
    • http://gifepo.andfairphotography.com/uploads/1/3/2/8/132815002/6652318.pdf
    • http://files.kelliescompass.com/uploads/1/3/1/4/131437676/afff9a10f6.pdf
    • http://files.mesamindfulness.com/uploads/1/3/1/3/131384335/c54a97c33ffd1.pdf
    • http://files.floridaacademyleague.com/uploads/1/3/1/4/131407705/safukig_gakajo_xinivema_lodibudesolafu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/nezawuxitag.pdf
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/nowowop.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/41108553636.pdf
    • https://cdn.shopify.com/s/files/1/0431/3939/9842/files/nozutimizulevatenizudoni.pdf
    • https://cdn.shopify.com/s/files/1/0431/0525/5577/files/90805634774.pdf
    • https://cdn.shopify.com/s/files/1/0428/4186/6403/files/rule_34_beerus.pdf
    • https://cdn.shopify.com/s/files/1/0436/2059/7923/files/nemewedekitudo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1219/3438/files/destination_b1_answer_keys.pdf
    • https://cdn.shopify.com/s/files/1/0431/2691/5239/files/lipebujusenalirazu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/gifob.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0945/files/nozodujegodoto.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_off00006648.bin
db47deef7694a02a3d95ea69c432afd604915adea8b6eebf2b50cd17457cf6db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6648 5392 bytes
font_01_sfnt_off00007879.bin
f77a458d482f4f438a080b036de172ca494aba085aeee8dbe5ce45d282cee1c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7879 10208 bytes
font_02_sfnt_off00009b58.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B58 4324 bytes

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