Malicious PDF — malware analysis report

Static analysis result for SHA-256 e622685ed2d9a31b…

MALICIOUS

PDF

48.2 KB Created: 2020-08-12 06:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01fc5b9d060862c18397b0bbdcddfb26 SHA-1: 1b973691c42f0d4d35adcb71b16cbbd4ca03af17 SHA-256: e622685ed2d9a31b58173992d7c0de7774b9331c0dcc9b64b3269683b61a4b88
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a tactic to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be the extensive use of malicious and SEO-linked URLs within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=aligarh+movement+essay+pdf
    • http://files.restonsusedbookshop.com/uploads/1/3/1/0/131070799/7d52e5d8.pdf
    • http://files.uk-racketball.com/uploads/1/3/0/7/130775505/rifokalijose.pdf
    • http://files.mylittleschooltoronto.com/uploads/1/3/2/6/132681317/xisavizupozoduxira.pdf
    • http://files.universalhighways.com/uploads/1/3/1/1/131163859/wisebiguki_jebojure.pdf
    • http://gexumuki.sdbau.shop/uploads/1/3/0/7/130739783/5467553.pdf
    • https://cdn.shopify.com/s/files/1/0431/3271/5163/files/tesajiwegititaxonomika.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9517/files/split_merge_software.pdf
    • https://cdn.shopify.com/s/files/1/0434/8067/8557/files/revised_bloom_s_taxonomy_poster.pdf
    • https://cdn.shopify.com/s/files/1/0440/3236/0613/files/97911567990.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/lolegotajakidinox.pdf
    • https://cdn.shopify.com/s/files/1/0436/8937/7945/files/2798646422.pdf
    • https://cdn.shopify.com/s/files/1/0433/0248/6180/files/jaxupavijuxisikulopexik.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/bulizezitereto.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/lugusuni.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0081/files/rovol.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/roniroximutegowabezuxotap.pdf
    • https://cdn.shopify.com/s/files/1/0437/1618/2166/files/bacteria_cell_wall.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/vivezilakujavanifefanuv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007111.bin
882c2a0c3635ba345f252d79eee1509621a5326eed6f83f0420acd15a92ee28e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7111 5396 bytes
font_01_sfnt_off0000834b.bin
7eb71e4e3eccb422805d7433adbca071c81c2cc6fa03500d89739a7e27ae66d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x834B 10068 bytes
font_02_sfnt_off0000a5a8.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A8 4324 bytes