Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b82f8f712ddb48d…

MALICIOUS

PDF

41.8 KB Created: 2020-08-13 23:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac18bd94c1aa54eb738e69714f4dba12 SHA-1: 663420d2db337fd143c168846d69f3d525465ed0 SHA-256: 2b82f8f712ddb48db454b668489088d68a30a8c076124d18af34c0d9efcbf5ed
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised within content related to car reviews, aiming to lure users to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many of which are hosted on benign platforms but likely serve as a distraction or part of a larger SEO poisoning scheme. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=jeep+patriot+reviews+2014+consumer+reports
    • http://xawewinu.leatherneckclassic.com/uploads/1/3/0/7/130775320/kedisuvatotujivi.pdf
    • http://files.charitysalon.org/uploads/1/3/2/6/132695575/8656631.pdf
    • http://files.indianamorganhorse.com/uploads/1/3/1/3/131398598/2150234.pdf
    • https://cdn.shopify.com/s/files/1/0438/1540/3682/files/balanced_scorecard_o_cuadro_de_mando_integral.pdf
    • https://cdn.shopify.com/s/files/1/0447/5761/4741/files/bibuwotulolefoku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14490041284.pdf
    • https://cdn.shopify.com/s/files/1/0431/6119/0554/files/sajenobos.pdf
    • https://cdn.shopify.com/s/files/1/0429/8457/1031/files/tixigefupiwagimak.pdf
    • https://cdn.shopify.com/s/files/1/0434/6803/0102/files/tafsir_sourate_al_mulk.pdf
    • https://cdn.shopify.com/s/files/1/0437/2099/9064/files/the_vixen_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/94665020407.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5842/files/zorenajetizuxeriz.pdf
    • https://cdn.shopify.com/s/files/1/0435/0597/5462/files/cetoacidosis_diabetica_gpc.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/7th_grade_common_core_math_assessments.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_off0000644e.bin
6adfc6fd485a35a7e6301aa0044664ad311da056e9afbda1e69ed70ee2a618a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x644E 5604 bytes
font_01_sfnt_off00007766.bin
7091837d8b043486ab2fb7db50fb0fe706e0018ca077414c064d94ee0780555f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7766 10192 bytes

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