Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecba3ef78f3e4a87…

MALICIOUS

PDF

43.1 KB Created: 2020-08-24 16:24:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65694880ff98f1306b656a77138f1510 SHA-1: ff201f87e0b24339384088d52613b2a0898c1e6e SHA-256: ecba3ef78f3e4a871a146a545364584ffd1d3b49f62a0236ed2782508cd5f705
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. The document body, though partially corrupted, contains text related to a game and the malicious URL. The PDF_SEO_LINK_FARM heuristic suggests the PDF is part of a larger link farm operation, likely for SEO manipulation or distributing malicious links. The primary malicious IOC is the redirector URL, which is used to lure the user into a potentially harmful download or exploit.

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.cc/pify?keyword=game+don%2527+t+starve+shipwrecked+free
    • http://narawi.mackprichard.com/uploads/1/3/2/8/132814930/burazebiv-jepowurovisizub-pikobopalo-bewegepawojado.pdf
    • http://sasufo.helpurchild.net/uploads/1/3/1/6/131606271/gufoxufu_romugiv_tizitazejodup_fokoxaso.pdf
    • http://files.daydreamandwonder.com/uploads/1/3/0/7/130738562/4084198.pdf
    • https://cdn.shopify.com/s/files/1/0436/3796/4960/files/vipajagadakezosekajinox.pdf
    • https://cdn.shopify.com/s/files/1/0431/6577/8076/files/anopheles_sp.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3132/files/55896929995.pdf
    • https://cdn.shopify.com/s/files/1/0435/8543/7853/files/further_mathematics_for_economic_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/67025498298.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/tisefasaforusu.pdf
    • https://cdn.shopify.com/s/files/1/0439/0027/2792/files/78118261675.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/rasokil.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3341/files/cambridge_dictionary_of_american_english.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/indefinite_and_reflexive_pronouns_worksheet_5th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0461/4435/6515/files/99243001173.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7201/files/certificate_template_design_background.pdf
    • https://cdn.shopify.com/s/files/1/0430/7507/6258/files/bopidaliwunebevabunukora.pdf
    • https://cdn.shopify.com/s/files/1/0428/8262/9798/files/dasar_dasar_akuntansi_jilid_1_al._haryono_jusup.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_off00006936.bin
dd3f913d34ade388e356b473e8056afdda7e259638197e21d78786e8ca7e77e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6936 5644 bytes
font_01_sfnt_off00007c5c.bin
a5971bdcd508698f862b9ef51f2e4cb3c1262c979440b43807e6927ab6e25274
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5C 10156 bytes