Malicious PDF — malware analysis report

Static analysis result for SHA-256 06712bffa266e118…

MALICIOUS

PDF

42.8 KB Created: 2020-08-06 14:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79d1aa731a493f039c954e176871a5ff SHA-1: 62025286c4a66b30a32348c6b1063688eb888b19 SHA-256: 06712bffa266e118ba922e89812ef41be6789c0d20d89ee5ffe0a03b5e5b9604
154 Risk Score

Malware Insights

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

The PDF document contains numerous links, including a primary redirector URL, indicating a link farm or redirection attack. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to direct users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the presence of embedded URLs and the link farm heuristic point to a malicious redirection pattern.

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/pify?keyword=believe+in+yourself+speech+pdf
    • http://files.heathervillari.com/uploads/1/3/0/7/130739315/lukame_mofamak.pdf
    • http://files.theempiricalherbalist.com/uploads/1/3/1/0/131070911/85cd701.pdf
    • http://files.flancmanfrisch.com/uploads/1/3/1/8/131871414/widapabidazuz-vulomal-pepap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7343/7847/files/98790909766.pdf
    • https://cdn.shopify.com/s/files/1/0438/3798/0834/files/xuxogorakilatel.pdf
    • https://cdn.shopify.com/s/files/1/0429/9276/3039/files/78449455050.pdf
    • https://cdn.shopify.com/s/files/1/0437/6471/1575/files/preg_match_find_all_img.pdf
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/10173575935.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/zejanir.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/53875145643.pdf
    • https://cdn.shopify.com/s/files/1/0428/1666/7814/files/67298916671.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6766/files/digital_marketing_meaning.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_off000069e2.bin
e074721cdb1a7ade71c518344fa98dbe4f3b9993a71cedccb8108efcac7e5b0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x69E2 5244 bytes
font_01_sfnt_off00007bc7.bin
17226527bdbf68ad931b112a5944d3c9123d0c3b0eaad1f989904f248b3593f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC7 10216 bytes