Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f98a4b34a759bd7…

MALICIOUS

PDF

41.3 KB Created: 2020-08-20 04:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d130b1f41c9c1c2c817192614c7b4982 SHA-1: 23645f1c03917d66249d754719c6ab943dc0a40a SHA-256: 8f98a4b34a759bd783b8ecacd7188c6ca3ec9d7b1b83d2d72eefdf8f0c2e3548
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though corrupted, contains text related to 'Bhagavad gita chapter 14 in english pdf' and a URL that appears to be part of a link farm designed to attract search engine traffic. The primary malicious link identified is https://ttraff.cc/pify?keyword=bhagavad+gita+chapter+14+in+english+pdf, which likely leads to a malicious payload.

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=bhagavad+gita+chapter+14+in+english+pdf
    • http://sejub.pfcpid.com/uploads/1/3/2/6/132695569/viminujuvus.pdf
    • http://files.frenchstandardpoodles.com/uploads/1/3/1/4/131437210/repuleti-ludivi-rufowigumibimo.pdf
    • http://files.abundantblessingweddingofficiant.com/uploads/1/3/0/8/130873810/8593848.pdf
    • https://cdn.shopify.com/s/files/1/0430/8815/0690/files/kadaj.pdf
    • https://cdn.shopify.com/s/files/1/0439/2583/1835/files/palipepovetovoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/1614/3526/files/kubler_ross_stages_of_grief_handout.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/52753692012.pdf
    • https://cdn.shopify.com/s/files/1/0437/2289/9608/files/78042548763.pdf
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/ximix.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/62908377932.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/eclipse_free_for_windows_8._1.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0850/files/gijitinizes.pdf
    • https://cdn.shopify.com/s/files/1/0445/6205/5332/files/fire_bible_esv.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fd5.bin
725d2c048bdb7cda0c02bfea75cf1f1526f0db83c40d3eb613c4acd2e6672b1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD5 5664 bytes
font_01_sfnt_off00007329.bin
33cfca7231ad9826306d06ceea6d04de1e26b2a4ac63c843c5fec251a939df34
pdf-font-stream PDF embedded font (sfnt) at offset 0x7329 12000 bytes