Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cae44fdbb78a070…

MALICIOUS

PDF

45.6 KB Created: 2020-08-21 07:17:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5beff9da94d63eb9a66cbacf141ccfe1 SHA-1: a74ad456c092512868bc690afaa5790667f1d37b SHA-256: 9cae44fdbb78a070a8ed7c88753e408d31a5fcd3ee501999f796c1105af2e98f
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm used for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, https://ttraff.cc/pify?keyword=google+classroom+app+for+android, which is likely intended to lead the user to a malicious site. The document body also contains this URL, reinforcing the lure. No scripts were extracted from this sample.

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=google+classroom+app+for+android
    • http://bitizoga.dustysprinklers.com/uploads/1/3/1/4/131437601/b7b930.pdf
    • http://xemasali.waverlyfc.com/uploads/1/3/0/7/130775350/1737242.pdf
    • http://files.germantownwrestling.org/uploads/1/3/1/3/131384300/medimoni.pdf
    • https://cdn.shopify.com/s/files/1/0431/2121/3591/files/lovilugavove.pdf
    • https://cdn.shopify.com/s/files/1/0434/3706/4354/files/kirunif.pdf
    • https://cdn.shopify.com/s/files/1/0433/8165/3655/files/mefogojudazipezisav.pdf
    • https://cdn.shopify.com/s/files/1/0429/9964/4314/files/introduction_to_elementary_mathematical_logic.pdf
    • https://cdn.shopify.com/s/files/1/0435/4388/8023/files/building_self_confidence_activities.pdf
    • https://cdn.shopify.com/s/files/1/0434/3952/1958/files/junior_basketball_court_dimensions_in_meters.pdf
    • https://cdn.shopify.com/s/files/1/0436/0326/3650/files/mossberg_500_for_sale_walmart.pdf
    • https://cdn.shopify.com/s/files/1/0430/2870/9539/files/nivolog.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9703/files/94229043243.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.pdf
    • https://cdn.shopify.com/s/files/1/0450/5288/7190/files/introduction_to_formal_language_and_automata_theory.pdf
    • https://cdn.shopify.com/s/files/1/0452/7711/8625/files/ctet_result_2019_july_marksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5545/6149/files/31740080782.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_off00007356.bin
0d7f563bf137fb044cefbdc7f690db041ea3958949dbb69287829936f725a02b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7356 5508 bytes
font_01_sfnt_off000085f9.bin
2028dcec42f72c222aad2366c61481402581fc572fb41f45c3ad9643831e4060		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85F9 10436 bytes

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