Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e413a628f30021…

MALICIOUS

PDF

43.5 KB Created: 2020-08-09 04:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4d9bac937b383925fc95721e98319c9 SHA-1: f9d883d3e1f74bf17300809225dcce9275340f4f SHA-256: d0e413a628f30021bbb73d6745c609bdf575cdc8b4e945f2e89297a19c8b02f4
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.ru/pify?keyword=adductor+strain+protocol+pdf'. The document body, though heavily obfuscated, contains references to the same URL and other PDF files hosted on Shopify, suggesting a link farm or redirection scheme. The ML classifier strongly indicates maliciousness, supporting the conclusion that this PDF is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=adductor+strain+protocol+pdf
    • http://files.vitalbalanceonline.com/uploads/1/3/1/4/131409761/ad58f3616.pdf
    • http://files.oilfieldfrclothing.com/uploads/1/3/1/4/131412558/2830019.pdf
    • http://latobum.aleksandragwardiak.com/uploads/1/3/1/6/131637309/9344566.pdf
    • https://cdn.shopify.com/s/files/1/0427/8019/7031/files/30529821952.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6079/files/geankoplis_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/complex_numbers_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3041/files/44424532842.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/34039775749.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/doluwewozopawezomofizavi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/atago_abbe_refractometer.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/xebabes.pdf
    • https://cdn.shopify.com/s/files/1/0430/7052/1495/files/wikupegu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/lusizotin.pdf
    • https://cdn.shopify.com/s/files/1/0438/4089/7184/files/sophie_s_world.pdf
    • https://cdn.shopify.com/s/files/1/0434/9617/7816/files/methow_valley_bulletin_board.pdf
    • https://cdn.shopify.com/s/files/1/0431/0886/0065/files/que_son_los_riesgos_psicosociales_en_el_trabajo.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_off00006d4c.bin
021f5eefe891b3b691b56ecab3c2b3f57b46f3cd07bb8ddf30b47b2e6e950d6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4C 5140 bytes
font_01_sfnt_off00007edb.bin
0ff3d297fb72d2d13aa31fd365943116f240a01f532cac4c3887cfc814ca844a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDB 10140 bytes