Malicious PDF — malware analysis report

Static analysis result for SHA-256 d204bd39af9f3c5c…

MALICIOUS

PDF

37.9 KB Created: 2020-07-16 16:16:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eed77001ba7ae41088a94f1e1df55274 SHA-1: 08b04be2dc91578b71e90f388adb49bde6e95b93 SHA-256: d204bd39af9f3c5cba67b89bcc86e1cb889fc86ea8a12b53a6f59737aedbdfc4
170 Risk Score

Malware Insights

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

The PDF is an image-based lure, typical of phishing campaigns. It contains a critical malicious redirector link pointing to ttraff.ru, which is known malicious infrastructure. The document also hosts a large number of external PDF links, likely for SEO manipulation or to distribute further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 2 image(s), only 0 text block(s), carries a click-outward action, and is only 37 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.ru/wb?keyword=oraciones%20subordinadas%20adjetivas%20ejercicios%20pdf
    • http://files.the-circle.ca/uploads/1/3/0/7/130776483/2270615.pdf
    • http://files.redmapleservicedogs.com/uploads/1/3/1/0/131070651/6465592.pdf
    • http://files.qtsc.biz/uploads/1/3/0/9/130969422/nidexipijoku.pdf
    • http://files.mbossinc.com/uploads/1/3/0/9/130969899/6890315.pdf
    • http://files.samuraisharp.com/uploads/1/3/0/9/130969330/ab893d70a873.pdf
    • http://files.rickironsrarecoins.com/uploads/1/3/0/8/130873855/xorupifajizomuda.pdf
    • http://files.homewareimports.com/uploads/1/3/1/1/131163957/rupivomelopob.pdf
    • http://files.himleyandswindonchurches.org/uploads/1/3/0/8/130874396/2422333.pdf
    • http://files.homewareimports.com/uploads
    • https://gumowep.files.wordpress.com/2020/06/nipozefipev.pdf
    • https://bizupugol.files.wordpress.com/2020/07/tezezopud.pdf
    • https://tigimizi.files.wordpress.com/2020/07/tedefoxebovimajodedobato.pdf
    • https://tanonikide.files.wordpress.com/2020/07/75686743944.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/28596735397.pdf
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/vuvozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0435/3950/files/xivawosidamani.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34456372212.pdf
    • https://cdn.shopify.com/s/files/1/0429/4659/2924/files/91118762159.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14985018959.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53940500656.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/67547556096.pdf

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