Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c2d41f4a5debab…

MALICIOUS

PDF

54.0 KB Created: 2020-08-09 04:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08b592983e3d37f9eecf4f709b3c0e7d SHA-1: 395f14057299fdb8dea0950524b7e2cdeb7d6e63 SHA-256: 32c2d41f4a5debabc7911720b3d33f466b6a37611be0e20073b08aa4d628f506
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating a redirector link to a known malicious URL. The document body, though heavily obfuscated, contains the target URL which is also listed as an IOC. The presence of numerous other links to Shopify, many with book-related slugs, suggests a link farm or SEO manipulation tactic to disguise the malicious redirect.

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=piaggio+beverly+200+manual+pdf
    • http://files.jaredkrout.com/uploads/1/3/1/4/131453198/fodavuzebuto.pdf
    • http://files.nc39thmasonicdistrict.com/uploads/1/3/1/4/131438228/sesosutigok_busorakuwuro_kenulujezo.pdf
    • http://files.ancientartisanredoaksaltlamp.com/uploads/1/3/1/4/131438539/4538167.pdf
    • http://rotavaxa.aartsmith.com/uploads/1/3/1/8/131871433/1473269.pdf
    • http://darule.gambrellchemistry.com/uploads/1/3/1/0/131070420/kefegogifi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/adverbios_de_frecuencia_en_ingles_ejemplos.pdf
    • https://cdn.shopify.com/s/files/1/0447/9172/6240/files/fast_times_at_ridgemont_high_123movies.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tagesagebog.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/vubakabinipipojilekupefox.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5239/files/pafajogenam.pdf
    • https://cdn.shopify.com/s/files/1/0449/6611/7544/files/combined_gas_law_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0440/2796/9686/files/5621760851.pdf
    • https://cdn.shopify.com/s/files/1/0429/1218/6531/files/miburizukuzizuvajamet.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3478/files/ragiwuzed.pdf
    • https://cdn.shopify.com/s/files/1/0435/3818/6392/files/33597855098.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/gesomeditom.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/
    • https://cdn.shopify.com/s/files/1/0429/1

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080f4.bin
9efd760fc01584a3f3a1457b44abd4691c910e4782a5b1ec82a91da3ae8989bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F4 5560 bytes
font_01_sfnt_off000093be.bin
f10522cf9c017a39fa6666c241b7d035b0e86ca8901f160c62ee39fbc14a58e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93BE 13176 bytes
font_02_sfnt_off0000bd47.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD47 4324 bytes

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