Malicious PDF — malware analysis report

Static analysis result for SHA-256 729ffd6bc91cb71b…

MALICIOUS

PDF

45.9 KB Created: 2020-08-06 21:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cb9a3e726662d4cbd9009bbeb87e4f8 SHA-1: 82938b617eee937f08d51679e7915207abcee454 SHA-256: 729ffd6bc91cb71b907525fbecfc03a9d4153aa70776a486a76ad4bd13c267ff
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 primary malicious URL identified is https://ttraff.cc/pify?keyword=bowie+knife+templates+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and appears to be a lure for users to click on the provided links.

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=bowie+knife+templates+pdf
    • http://files.hannahjaggers.com/uploads/1/3/0/7/130775085/ec9279b2549.pdf
    • http://files.blueberrycreek.ca/uploads/1/3/1/4/131452824/a5785628f9.pdf
    • http://files.westfielddentalpa.com/uploads/1/3/0/7/130775942/bavef_kezujuwusuk_javexolizepun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2606/2239/files/85244047850.pdf
    • https://cdn.shopify.com/s/files/1/0431/1056/3994/files/csf_circulation.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/kamojutusafiba.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/xuroxoxikilekelalenijowi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4926/2997/files/5609670357.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/xawesi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4782/1205/files/wanemalejalitaja.pdf
    • https://cdn.shopify.com/s/files/1/0448/1653/1617/files/diagnosis_asma_pada_anak.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/81043174309.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/12509450796.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/xuxipaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78030006053.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/30357895467.pdf
    • https://cdn.shopify.com/s/files/1/0433/4839/4142/files/96561518393.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007613.bin
97819143523040e0917e2b51449bb391c198a38a8d35da7cbb6853b1eaaf7085		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7613 5296 bytes
font_01_sfnt_off00008822.bin
c73d83c69a419a7cbaa76a99749eb02f30b8baa7aa2edab4aba6c9bee2109f91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8822 10160 bytes

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