Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc77f2b72a9ddb0b…

MALICIOUS

PDF

31.0 KB Created: 2020-09-06 17:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 037e8930714923d307ab56bbf172b698 SHA-1: 28e00776a00c6cbec5919db146a85ac95b65fb81 SHA-256: bc77f2b72a9ddb0b9925d71362f75fee75000e3b8d6929692f5ecf6d112add6f
170 Risk Score

Malware Insights

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

The PDF is identified as an image-only lure, typical of phishing campaigns. It contains a critical link to a known malicious redirector, ttraff.me, which is designed to lead users to malicious content. The document also hosts a large number of external PDF links, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicates 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 30 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.me/wix?keyword=4.+5mm+fibre+cement+sheet+bunnings
    • https://cdn.shopify.com/s/files/1/0436/5733/0853/files/fogelidizaguj.pdf
    • https://cdn.shopify.com/s/files/1/0435/0931/7787/files/mathematics_for_economic_analysis_hammond.pdf
    • https://cdn.shopify.com/s/files/1/0434/4935/2349/files/shear_force_and_bending_moment_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/3767/1075/files/dikokotarani.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3920/files/autosync_google_drive_pro_apk.pdf
    • https://static.usrfiles.com/ugd/8c2e83_f98d126cb53f4e86869c04b2e9796b00.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5e07f0d016147b8b28ddc512b72ef60.pdf
    • https://static.usrfiles.com/ugd/31593d_11c571b9b93f45ebb44e8cf33797e7b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_428b077b14644b6ab0bd1aaf80daee26.pdf
    • https://static.usrfiles.com/ugd/e2c223_624b21947f4742baa7ce3f612ffb95eb.pdf
    • https://static.usrfiles.com/ugd/d775a9_89ab5ab419e14948bc1c000c038ab819.pdf
    • https://static.usrfiles.com/ugd/83b1b3_d106ce9c4ca64e65a8b24330087eac82.pdf
    • https://static.usrfiles.com/ugd/91e123_7accda827c0b4721b4186b6f195f20e8.pdf
    • https://static.usrfiles.com/ugd/455f95_bb3f3f79d4fe4cd082a1d5f3485a9142.pdf
    • https://static.usrfiles.com/ugd/3bca44_2910015139414412ac11464ea27183d4.pdf
    • https://static.usrfiles.com/ugd/63f22d_2dcdcf2debf340848016c52d879105eb.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000041ed.bin
10524847a6a9eb57d4189d2f3f2d9599863224ebabcaa1937fdeca7257b30457
pdf-font-stream PDF embedded font (sfnt) at offset 0x41ED 5344 bytes
font_01_sfnt_off00005406.bin
6518445457942af46f0e258e4d55ca3b6631b429d281420ac715a995443357c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5406 7988 bytes