Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea220bda875b53e…

MALICIOUS

PDF

37.2 KB Created: 2020-08-12 16:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f691022631dd83ae0e1eb8c8ec66109 SHA-1: 02f14deb890658a468e876f5b9b4d2ff79a77d21 SHA-256: 4ea220bda875b53ec8a8568915393c2ffac1e9a2cdc9d082768862df811976c7
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a link farm and a direct link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=phonemes+and+allophones+exercises+and+answers+pdf', which is flagged as malicious. The presence of numerous links to PDF files hosted on various domains suggests an attempt to create a link farm for SEO poisoning or to distribute further malicious content.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=phonemes+and+allophones+exercises+and+answers+pdf
    • http://bagalu.lifeinsuranceshoppingblog.com/uploads/1/3/0/8/130814297/jemubodijorukepin.pdf
    • http://tijunanub.spice4kids.org/uploads/1/3/0/7/130738720/683907.pdf
    • http://files.renoirpropertygroup.com/uploads/1/3/0/7/130739393/cf987b7b53a17.pdf
    • http://gusupix.eco-logical-resolutions.com/uploads/1/3/2/7/132740405/4873002.pdf
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/62073005179.pdf
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/46767599706.pdf
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/telakesefafixipegexep.pdf
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/sixuferejadekusaxujipibez.pdf
    • https://cdn.shopify.com/s/files/1/0432/8669/1998/files/48227004707.pdf
    • https://cdn.shopify.com/s/files/1/0449/3587/2667/files/ups_air_waybill_form.pdf
    • https://cdn.shopify.com/s/files/1/0438/4456/7197/files/boarding_pass_wedding_invitation.pdf
    • https://cdn.shopify.com/s/files/1/0434/0301/8392/files/que_es_la_caida_de_tension.pdf
    • https://cdn.shopify.com/s/files/1/0435/1941/0335/files/pesovegobomatipina.pdf
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/getoxebi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/xamumofolunokotoserejeba.pdf
    • https://cdn.shopify.com/s/files/1/0448/0018/0375/files/meaning_of_product_life_cycle.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.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_off00005262.bin
e833a23d48a9a01910b2b7f9ec707a198dde63e6a18edb2440e7ded4cdc94a37
pdf-font-stream PDF embedded font (sfnt) at offset 0x5262 5556 bytes
font_01_sfnt_off0000652a.bin
a3fd32e055ac9c28edee6f049e0cd5dad7f757fee246740835ce19f7bbdd2fd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x652A 10076 bytes