Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad87a8b473bc61df…

MALICIOUS

PDF

48.8 KB Created: 2020-08-12 17:36:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c6a2ae32bd751c1fb010aaae9b4f519 SHA-1: 5f77b25277f7a255cd6bf04a025fae54ab63f2e2 SHA-256: ad87a8b473bc61dfc34c9c9b80d1d1cb57ced0d817d0c8d53a75c160f1c16acd
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=banking+awareness+questions+and+answers+pdf'. This URL is embedded within the document body, suggesting a social engineering lure related to banking awareness. The file also contains a large number of external PDF links, many hosted on Shopify, which is flagged as a link farm. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=banking+awareness+questions+and+answers+pdf
    • http://files.condoinph.com/uploads/1/3/1/6/131606059/kenarasodojiraz-jupubuxopegi.pdf
    • http://files.talleir.com/uploads/1/3/2/7/132740930/mamasazaleka.pdf
    • http://tabum.tooreens.com/uploads/1/3/2/6/132683051/08ac691ff96f.pdf
    • https://cdn.shopify.com/s/files/1/0431/8491/4583/files/26990768577.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/61888903831.pdf
    • https://cdn.shopify.com/s/files/1/0437/5265/2951/files/business_english_vocabulary_upper_intermediate.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/apprendre_l_arabe_pour_dbutant_gratuitement.pdf
    • https://cdn.shopify.com/s/files/1/0437/6287/6565/files/have_been_and_have_gone_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/2940/5600/files/an_anthology_of_english_short_stories.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/juwejulexezisejiruwopok.pdf
    • https://cdn.shopify.com/s/files/1/0435/9343/3246/files/diseo_de_base_de_datos_distribuidas.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/26737935583.pdf
    • https://cdn.shopify.com/s/files/1/0437/6618/6135/files/72875892673.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/wanting_memories.pdf
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/dubikevaravaliselawuzikow.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/96977338804.pdf
    • https://cdn.shopify.com/s/files/1/0432/6742/4412/files/comunismo_socialismo_e_capitalismo.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_off00007f69.bin
a0d691f1f9993bd56321afbae3fbde6ee05d0549472d49eb7fe0b2551e414e35
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F69 5508 bytes
font_01_sfnt_off0000923e.bin
a2c87012ff823f086953aa609049ea9fb915a0b7dda5b4f80510e247c840f26c
pdf-font-stream PDF embedded font (sfnt) at offset 0x923E 10512 bytes