Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d3fbf50b6d15af…

MALICIOUS

PDF

48.4 KB Created: 2020-08-12 03:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48dd2f889b9ca8a288d66e10ab77c64b SHA-1: a3adca61f00b0660f643e2d51b0cf4d1e7be64bd SHA-256: a7d3fbf50b6d15af27dcadd124cb8215bfdcfec86bc636446dc7f22559692c88
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to ttraff.ru, disguised as recruitment information. This suggests the document's primary purpose is to lure users to malicious infrastructure. No scripts were extracted, but the embedded URLs and PDF link farm heuristics strongly indicate a phishing or redirection attack.

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/wb?keyword=wbsetcl%20recruitment%202018%20syllabus%20pdf
    • http://files.renewswindon.org.uk/uploads/1/3/1/4/131483281/3539652.pdf
    • http://files.wheatgrasspublishing.com/uploads/1/3/1/3/131381414/tumirazerawufu_borefetefupo_sulunowuji.pdf
    • http://nakitoxon.alcoholdrugevaluations.com/uploads/1/3/1/3/131384635/venazoxemuzebafibog.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/fatamipiwasorumemitedax.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7917/files/surixivezot.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/mowerawu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/bonded_space_maintainer.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1693/files/bewiro.pdf
    • https://cdn.shopify.com/s/files/1/0432/2961/0141/files/design_e_comunicao_visual_bruno_munari_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/51900844894.pdf
    • https://cdn.shopify.com/s/files/1/0434/0845/7877/files/juloriwadiguris.pdf
    • https://cdn.shopify.com/s/files/1/0435/2311/3119/files/tower_200_exercise_chart.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065b9.bin
2f7d6624c6e6d49a2dda1fb68eaa6f9e858d458dc77ede571c146a5f1323ac2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B9 6076 bytes
font_01_sfnt_off00007a63.bin
1b13e56b647bcbe4bb67fffca1bcc49fe4360df032095318d669ed2ec0e4cbaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A63 11260 bytes
font_02_sfnt_off00009fdd.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FDD 16092 bytes

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