Malicious PDF — malware analysis report

Static analysis result for SHA-256 0780140d3f42d016…

MALICIOUS

PDF

44.7 KB Created: 2020-08-30 16:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16b29204f4a9ddde4b86c86a5c50adcd SHA-1: 1876a49f36c5a458f2469e4d81ea47b3c3864834 SHA-256: 0780140d3f42d0161e3d9a928e98dad26a0e09d306a7a3b69b06c1c41a5b3e4e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link that redirects to a known malicious URL, disguised as a torrent download for sports matches. This is further supported by heuristics indicating a malicious redirector and a link farm, suggesting an attempt to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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.ru/wix?keyword=torrent+to+download+sports+matches
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4369/1413/files/negative_mandatos_formales.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/54299164365.pdf
    • https://cdn.shopify.com/s/files/1/0441/3505/5512/files/pengertian_bilangan_biner.pdf
    • https://static.usrfiles.com/ugd/a467d2_d2506a76b8a44742b66c99a6d053fe4c.pdf
    • https://static.usrfiles.com/ugd/55f640_4b1a0547e02c49f0bbc3931295159930.pdf
    • https://static.usrfiles.com/ugd/b8c837_218497b50b594ead968c1459b005b99b.pdf
    • https://cdn.shopify.com/s/files/1/0431/0620/5857/files/current_affairs_2020_19_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/42121962041.pdf
    • https://cdn.shopify.com/s/files/1/0432/9934/0448/files/answer_to_the_impossible_quiz_question_15.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31178329868.pdf
    • https://static.usrfiles.com/ugd/b8c837_adbb3d1db2164523bd9a24be3bc4e5ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_e31805ad2bf1404c9b482ac49583b423.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_off00006fae.bin
e2b39ecbcba92a51a077275ebbd3c4c5382767172e6ff9437439103019a1bf82
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAE 5356 bytes
font_01_sfnt_off000081c2.bin
f33393a3797f777fefcf00aa9f5320bf9df64d5120f52c816be02e631f425d32
pdf-font-stream PDF embedded font (sfnt) at offset 0x81C2 11348 bytes