Malicious PDF — malware analysis report

Static analysis result for SHA-256 818972b39b6cca0d…

MALICIOUS

PDF

41.9 KB Created: 2020-09-01 04:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c0ce4fdd79260b138077f3b0c62ee04 SHA-1: a229196c9c45c3371c66c5a850209c4aa37edd73 SHA-256: 818972b39b6cca0deeab31bc66651933d7080956f17e3c58a2c35b59a179d9aa
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting an attempt to lead the user to a malicious site. The document body, though partially obfuscated, contains the same URL and references a meme template, indicating a social engineering lure. The presence of numerous other PDF links, many pointing to benign content, suggests a link farm or SEO poisoning attempt to obscure the malicious URL.

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/wix?keyword=woman+yelling+at+cat+meme+template+hd
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/95089d_69f9938e1d53446e89accc9d173baa13.pdf
    • https://static.usrfiles.com/ugd/7c30af_1f5e63044cc34cafa4501a1a148ab721.pdf
    • https://static.usrfiles.com/ugd/8ba634_ae6167e64f5646d8bc6d55235ce1a839.pdf
    • https://static.usrfiles.com/ugd/ea78e0_39dc893771ed438a8e21608d4256b2e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_9af3265543474d41b4bdf191b94d007a.pdf
    • https://static.usrfiles.com/ugd/d4579c_8a42271d58e54c9e92ae4739572690ea.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/dofudabepepibikejunizu.pdf
    • https://cdn.shopify.com/s/files/1/0443/9402/1030/files/archie_comics_english.pdf
    • https://cdn.shopify.com/s/files/1/0435/7901/5327/files/33947194839.pdf
    • https://cdn.shopify.com/s/files/1/0433/2175/3758/files/dubixovikadabupitedinod.pdf
    • https://static.usrfiles.com/ugd/930050_49d4ea3b8f7141cab323b5f431963f37.pdf
    • https://static.usrfiles.com/ugd/f65175_4aa1d0eff66045728c7445db83f3eacf.pdf
    • https://static.usrfiles.com/ugd/1e32c2_486e1006a0f048b2bb43597a5c85d5ad.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_off00006432.bin
458da951c4b4f6c32c7a679bed7dfbbe88d70a11bc6f86bf4c5bef287827de75
pdf-font-stream PDF embedded font (sfnt) at offset 0x6432 5328 bytes
font_01_sfnt_off0000763f.bin
82936bf40b223fe0c18d3cee4925a1ac4ab986d248023012336fed883fe565c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x763F 10616 bytes