Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e36e71e74abcf53…

MALICIOUS

PDF

39.8 KB Created: 2020-07-29 14:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12d119302879d2a927389e917614067d SHA-1: 47a3892fac30a0754cb1fda597f4d3d06bd546e8 SHA-256: 9e36e71e74abcf53b9aec43e7fc22567ac1b46e9f412e3ed477c0c9d9a94d30f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO spam campaign. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious destination. The document body is heavily obfuscated and unreadable, but the presence of the malicious redirector and the link farm strongly indicate a malicious intent to redirect users to harmful content.

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=cuaderno+de+investigacion+en+psicologia+social+pdf
    • http://files.briannaholt.com/uploads/1/3/1/4/131406365/bumitamedami-sukilebi-ponojuzorus.pdf
    • http://files.childrenscauseoc.org/uploads/1/3/1/4/131408970/bd4224e9.pdf
    • http://files.cg-anim-8.com/uploads/1/3/0/7/130776611/zekixuridugoke.pdf
    • http://files.gerhardsnewsblog.com/uploads/1/3/0/9/130969775/fawal.pdf
    • https://cdn.shop
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/nurijilepidowuju.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/51674005296.pdf
    • https://cdn.shopify.com/s/files/1/0430/8110/5562/files/marulifibaziwijosa.pdf
    • https://cdn.shopify.com/s/files/1/0440/2796/9686/files/43377212562.pdf
    • https://cdn.shopify.com/s/files/1/0429/3473/0911/files/surozoju.pdf
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/99655600041.pdf
    • https://cdn.shopify.com/s/files/1/0440/1194/6134/files/1909691062.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/zepuxun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19463184481.pdf
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/vezenakuwovirunibugapumik.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/83907805809.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuxevitilikibuvenimomabu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kevimofurerofujasopam.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/12607779940.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_off00005b3f.bin
afdfc9c06ea9c196baf5b5da739a095ceadcefa83788c7ebfd710a1206e0ce66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3F 5288 bytes
font_01_sfnt_off00006d56.bin
aca80b9dc32f09a51208710ebdce8ad5bf166e1dd92bff61416d0cdac260df74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D56 10572 bytes

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