Malicious PDF — malware analysis report

Static analysis result for SHA-256 791e59d0b584016f…

MALICIOUS

PDF

46.0 KB Created: 2020-08-18 21:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 118b9c60bde4e7a560547d34f5796de3 SHA-1: f9f5a3283f141a7bd378b5d66583ac01118f9807 SHA-256: 791e59d0b584016f6e541e83fa3c62e215ad912d5e8d984ae6f75ee1b24085e8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The ML classifier also strongly indicated maliciousness. The document's primary function appears to be acting as a link farm to distribute traffic to potentially harmful websites, likely for phishing or malware distribution.

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=skechers+performance+go+run-+vortex%2528+womens%2529
    • http://files.bullbearkidsbooks.com/uploads/1/3/2/6/132681404/medewesiposade.pdf
    • http://files.jenniferphamportfolio.com/uploads/1/3/0/7/130740521/mujetajolof_wewuzej_dolukopotuwov.pdf
    • http://nofozubu.ronellehartpsychologist.com/uploads/1/3/2/8/132814930/fukonufofex_rozixexiwodo.pdf
    • http://files.lucidartgallery.co/uploads/1/3/0/7/130738821/zegufezavofedoluweza.pdf
    • http://kupirip.crossplainspd.org/uploads/1/3/1/6/131606490/9782000.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/69316435978.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/foxikiti.pdf
    • https://cdn.shopify.com/s/files/1/0435/1744/4264/files/mozedajakizanomuboxuvuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56325204281.pdf
    • https://cdn.shopify.com/s/files/1/0434/8978/8070/files/sownictwo_biznesowe_angielski.pdf
    • https://cdn.shopify.com/s/files/1/0433/1362/7294/files/sovenotuviveresivupejon.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/titulozirabuzizobeviw.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4070/files/40730427381.pdf
    • https://cdn.shopify.com/s/files/1/0438/5816/5925/files/31794278544.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zebegevuda.pdf
    • https://cdn.shopify.com/s/files/1/0439/3458/0891/files/retensio_plasenta_adalah.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_off00005ad2.bin
dbc963c4e2b73b5f1e8dc24256ef69946e28cc3d82c1aa33ae6c8ee0d84b8bf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD2 5804 bytes
font_01_sfnt_off00006e95.bin
2bae8043ce63f70520622c2c925952b3b6edf6dbb340b15543e193fa03af58af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E95 14912 bytes
font_02_sfnt_off00009cdc.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CDC 4324 bytes

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