Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a6b0d403d7b71df…

MALICIOUS

PDF

39.0 KB Created: 2020-08-18 20:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec0334fe8eb978070fcf1697edfca7ea SHA-1: 828db47039058c169c6cbf5bcf51a1d41455d055 SHA-256: 2a6b0d403d7b71dfa78f870057a7fe77e62801f187050cf7ed10d72ce3255e90
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, with one heuristic specifically identifying it as a PDF link farm. The presence of a link to a known malicious redirector, ttraff.cc, suggests an intent to lead users to harmful content. While many links point to benign Shopify domains, the overall structure and the malicious redirector indicate a deceptive or malicious purpose, likely related to SEO manipulation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=bal%25C3%25A3o+da+informatica+em+paulinia
    • http://zemuk.clevelandsecuritycameras.net/uploads/1/3/1/4/131407921/lisilodifazuki.pdf
    • http://files.daviestreeservicesltd.co.uk/uploads/1/3/0/8/130814280/kamipabotu.pdf
    • http://files.stitchedbyknight.co.uk/uploads/1/3/2/7/132711999/rebepibesifibul-zetapeti-nufizejesosa.pdf
    • http://dapuv.triplex-arrow.com/uploads/1/3/1/4/131408100/zuxeravazazo_supatuzunafom.pdf
    • http://files.planetdotjewelry.com/uploads/1/3/1/4/131437474/muwaz.pdf
    • https://cdn.shopify.com/s/files/1/0440/7646/6328/files/60194441318.pdf
    • https://cdn.shopify.com/s/files/1/0433/7539/4977/files/34000178190.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8299/files/85864223840.pdf
    • https://cdn.shopify.com/s/files/1/0438/2290/7549/files/40352401971.pdf
    • https://cdn.shopify.com/s/files/1/0434/8667/5109/files/xisonofivoxajobexi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/jedeposutonozemisiranovig.pdf
    • https://cdn.shopify.com/s/files/1/0434/5774/0967/files/bukate.pdf
    • https://cdn.shopify.com/s/files/1/0435/3739/9957/files/tremulus_rpg.pdf
    • https://cdn.shopify.com/s/files/1/0440/6712/7446/files/soforozirikeji.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/vuvogalemudekakiditakesi.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/penufezosomafewawe.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_off00004bbf.bin
c41afc31ad3c6fb0ef36f394a5e30d08a0166c5ddff34ce218fb0d35a491cfff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BBF 5488 bytes
font_01_sfnt_off00005db1.bin
4390d46cab64c31557786a176fe1b7a68a9bb4abb85b28ba58735936f440d625		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB1 1972 bytes
font_02_sfnt_off00006726.bin
af18435d32ef5088e63eecfc02bb8b1a8f9a3d2aedd60e5e63d66daa047b2e86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6726 12184 bytes

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