Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a77722ffd080e90…

MALICIOUS

PDF

44.0 KB Created: 2020-08-05 14:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b56e434cb488c486832497b0a625451 SHA-1: be2627ffaab9de9d182ecfad1ac8c0edd2023697 SHA-256: 4a77722ffd080e90b1ae34d4638424e7ab04e7c411a57631414910c249a9ccf4
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, which is further supported by the embedded URL pointing to a suspicious domain. The document body text is obfuscated but contains keywords related to search results and a URL, indicating a lure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning to attract victims. 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.com/pify?keyword=bise+sukkur+matric+result+2020+pdf+download
    • http://files.fairfaxfletchersoccerclub.org/uploads/1/3/1/8/131871484/wosunolojutil-nejimivixeg.pdf
    • http://files.realestateleadsprospector.com/uploads/1/3/1/0/131071043/6c01eb76b.pdf
    • http://files.nienkemink.com/uploads/1/3/0/9/130968920/bevuxebusosobogati.pdf
    • http://files.huntershealingcalls.com/uploads/1/3/1/4/131438216/vumevatazagovo.pdf
    • http://files.robmatthewsmbe.net/uploads/1/3/1/3/131381679/konusekexemutelo.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/73633775288.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/seek_and_destroy_tab.pdf
    • https://cdn.shopify.com/s/files/1/0435/1908/2651/files/63012798303.pdf
    • https://cdn.shopify.com/s/files/1/0437/3512/2081/files/27692921176.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61086590007.pdf
    • https://cdn.shopify.com/s/files/1/0431/3559/8758/files/41434063373.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7146/files/kepepujadelukoxuzozusilo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1863/9765/files/mathematics_grade_9_teachers_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/3797/2897/files/jedagikopubijipeka.pdf
    • https://cdn.shopify.com/s/files/1/0430/2569/4883/files/79362480717.pdf
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/tapulifufapeditifujolasif.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/lozesefitugokifakomirep.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_off00006536.bin
e03373b4fdb951cdb2f5bfa2e1d60c449c9530bcc2cab9ed9d4b6fc38eba3c30
pdf-font-stream PDF embedded font (sfnt) at offset 0x6536 5780 bytes
font_01_sfnt_off000078e4.bin
9ba515af1606bedb75fc72bf4be0ff6bf0d8a37c12ccbb7e68f98eea61f66a4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x78E4 13352 bytes