Malicious PDF — malware analysis report

Static analysis result for SHA-256 35b6a757441d17ef…

MALICIOUS

PDF

34.8 KB Created: 2020-08-12 20:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f0b2aeb84d3c48d4f9010f5d0fb8679 SHA-1: 87c4480860e0e2589ea6167b7ae7be3171edc2a8 SHA-256: 35b6a757441d17efdd77cc2e2dfe617676b14253c25e4b552ad53b92c0eac7be
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a redirector to a known malicious infrastructure. The document body is heavily obfuscated but contains references to URLs, including the malicious redirector. The presence of a large number of external links suggests a link farm or SEO manipulation tactic, potentially to obscure malicious activity or drive traffic to malicious sites.

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=bansuri+vadan+course+pdf
    • http://bajowofe.hairbyannettesisson.com/uploads/1/3/2/8/132814930/33480f.pdf
    • http://difaxi.fenceposttrading.com/uploads/1/3/1/4/131437657/mebisopajek_segiredotov.pdf
    • http://files.savorlifenutrition.com/uploads/1/3/0/7/130775402/muruzavekelewe.pdf
    • https://cdn.shopify.com/s/files/1/0435/8891/1267/files/77624976776.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/52251408743.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zurutadodusabexefiba.pdf
    • https://cdn.shopify.com/s/files/1/0431/6905/4886/files/9665761676.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/nogodumojomus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16216600544.pdf
    • https://cdn.shopify.com/s/files/1/0435/9290/8963/files/zokumew.pdf
    • https://cdn.shopify.com/s/files/1/0435/5912/5160/files/82089008338.pdf
    • https://cdn.shopify.com/s/files/1/0434/9437/5576/files/44787440670.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6492/files/labavexulapubulojilezeze.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/yamaha_raptor_660_parts.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6218/files/sugumiwab.pdf
    • https://cdn.shopify.com/s/files/1/0434/0439/4646/files/mcmurry_8th_edition_solutions_manual.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_off00004938.bin
d9b948fd6177ba48e928220f2f9217a3cd38cfc894a0e6d236b08b35c0ad7afe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4938 5228 bytes
font_01_sfnt_off00005b0d.bin
cdaf2dbf9a5c453d12e97aac68c2bb0eea74f7ea38e435d5ab2ad750953cf8a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0D 10404 bytes

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