Malicious PDF — malware analysis report

Static analysis result for SHA-256 642fa4d6fa9c5b1b…

MALICIOUS

PDF

45.5 KB Created: 2020-08-23 19:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20981f5be99275bbc0a57eafbc01bc2e SHA-1: e169066f9e27c2f3df895f1ae0a68075c63e99e6 SHA-256: 642fa4d6fa9c5b1bea0707273c871164b81695a4a108f70ae1e49e1de29ec05d
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for phishing and malware distribution. The document body and embedded links suggest a lure related to entertainment content to entice users to click on malicious URLs. The ML classifier strongly indicates malicious intent.

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=ajay+devgan+movie+platform+hd+video
    • http://miguke.passagesandpathways.com/uploads/1/3/1/3/131381679/fuxebugot.pdf
    • http://files.leah-drake.studio/uploads/1/3/1/0/131070089/tajujokinutunul.pdf
    • http://nobezan.royalqueendom.com/uploads/1/3/1/4/131453512/401ae3b2dda217.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/pojevisesubasizekukoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/60299516550.pdf
    • https://cdn.shopify.com/s/files/1/0436/9481/7445/files/17178373367.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3406/files/ashrae_handbook_fundamentals_1997.pdf
    • https://cdn.shopify.com/s/files/1/0435/7373/9675/files/aula_anemia_falciforme_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0430/4325/8522/files/41365694872.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/60622803591.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/aakasam_lona_oh_baby_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0437/9066/3832/files/xobisagigalogowiteno.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98629167596.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/70851069057.pdf
    • https://cdn.shopify.com/s/files/1/0430/6783/4517/files/blitzscaling_reid_hoffman_download.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_off00007238.bin
bd1ff12b9878e4f929137eabd86b91ce2b5bd565058379a63f32859d9da80422
pdf-font-stream PDF embedded font (sfnt) at offset 0x7238 5504 bytes
font_01_sfnt_off000084e0.bin
9b2750b15ad7f5c2a052de43dcab1ad6885d4a2e8e74a522a423cca71b515c5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x84E0 10700 bytes