Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ea3f6513c4aaf5…

MALICIOUS

PDF

44.7 KB Created: 2020-09-01 03:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf883df8d97a59020503c4e8a0b400a0 SHA-1: 1f5050228c375780f14bfb208a7912cc5ff4f757 SHA-256: d6ea3f6513c4aaf5a8b4200edd8b5b15f9bd67b117198a9216841285f5f01d60
152 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and contains numerous embedded URLs. One of these URLs, 'https://ttraff.ru/wix?keyword=cercle+de+la+forme+raspail+horaires', is flagged as a known malicious redirector. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute malicious content.

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=cercle+de+la+forme+raspail+horaires
    • https://www.cercle
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/xaligelekapeke.pdf
    • https://cdn.shopify.com/s/files/1/0465/1230/8382/files/83387588664.pdf
    • https://cdn.shopify.com/s/files/1/0457/3973/7244/files/alternating_current_examples.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4087/files/62690579223.pdf
    • https://static.usrfiles.com/ugd/ac72e0_855b392267914fd99c8e680e803fa09d.pdf
    • https://static.usrfiles.com/ugd/ae059d_b4dd84cf1cf441f19eb6db97c31e514c.pdf
    • https://static.usrfiles.com/ugd/cfa91a_ee30f325ddd5490a9adb9a78d60ec598.pdf
    • https://static.usrfiles.com/ugd/a48928_e751dcd9549f4acf884ff243be879eb6.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/10433132188.pdf
    • https://cdn.shopify.com/s/files/1/0448/0991/2480/files/fisivarivagaloviledeneg.pdf
    • https://cdn.shopify.com/s/files/1/0465/4995/8814/files/35092606385.pdf
    • https://cdn.shopify.com/s/files/1/0433/7310/1219/files/13682353446.pdf
    • https://static.usrfiles.com/ugd/79e0dc_7bbfdfdc27d74c6b84ab1b4e0e7cdb6b.pdf
    • https://static.usrfiles.com/ugd/73c254_0ab6794148b74f69b616679b9766ae36.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef21abd4d10d4d0490ede476d398db3f.pdf
    • https://static.usrfiles.com/ugd/96bf9d_1542698f4278484f911a906dcd35901a.pdf
    • https://static.usrfiles.com/ugd/0047a4_ebf885f5e3b44ec5bc729658a1f36ba1.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_off00006b5e.bin
5efb6761c0a4734acaa770bdbf2680204ca0d52277425a962a9bc3bb8b336ad7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5E 5300 bytes
font_01_sfnt_off00007d38.bin
2ed30de914206ad770303d1292ef50fa414e68db87ac41ec4ab48c5ba222099c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D38 12312 bytes