Malicious PDF — malware analysis report

Static analysis result for SHA-256 67beb1f7fbfd1658…

MALICIOUS

PDF

46.5 KB Created: 2020-08-18 19:38:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce1d0842726b0f547c6109f24875a112 SHA-1: f35a01737abfca709d50aa2ec26a6898dc034caf SHA-256: 67beb1f7fbfd165833fecf45c07770217ac8d2052e8c1f3e28149ff68db1e32b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary malicious indicator being a redirector URL that leads to potentially harmful content. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, likely serving as a lure to a phishing or malware distribution site.

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=sapna+choudhary+songs
    • http://files.isleypercussion.com/uploads/1/3/1/0/131071137/lizezopevalo.pdf
    • http://files.callihanscache.org/uploads/1/3/0/7/130739715/depit_bimukekexo_jufiv_favevurosovi.pdf
    • http://files.chamedicals.com/uploads/1/3/2/6/132682861/rusidekosuwanu-fenizov.pdf
    • http://files.my-gama.com/uploads/1/3/1/4/131453252/suwipebozolinekituvo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0430/8746/2551/files/1242485974.pdf
    • https://cdn.shopify.com/s/files/1/0428/2567/9015/files/83086147893.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kuzizurogepibisomagin.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/mipegepatetilarik.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/job_application_letter_format_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0437/8771/4721/files/45036537576.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/gumakujapowejoxet.pdf
    • https://cdn.shopify.com/s/files/1/0430/7451/9194/files/polarity_index_of_solvents.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3674/files/17949941371.pdf
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/zapomerobonetoniroj.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/61757589868.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_off000055a9.bin
3b31d6f79879d87a6b3156bcb5b2d183150a48875e5fb53f30e65b2aa172876b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55A9 5508 bytes
font_01_sfnt_off00006854.bin
5f7769e6f7b6982474de5033bc1f921bb09f8b0ebea6fd0135165a5dc7e98604		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6854 13940 bytes
font_02_sfnt_off0000948b.bin
cf8e38efee1b3583380e6bd19f730ec89686c86ee6b43a3dfca5788909220895		 pdf-font-stream PDF embedded font (sfnt) at offset 0x948B 7272 bytes

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