Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8af29ec19db4564…

MALICIOUS

PDF

55.4 KB Created: 2020-08-11 03:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4e4394fd5ea799050a5825e4ee5bbb0 SHA-1: 866935956b6770fcfdc7f313b84f955fcb69d7a2 SHA-256: d8af29ec19db45641eadd8af8bf60b0e68d15cecbbff859eff6cd78721cec563
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at "https://ttraff.cc/pify?keyword=debate+rules+for+college+students+pdf". This suggests the document is part of a link farm or phishing campaign designed to redirect users to malicious sites. No scripts were extracted from this sample.

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=debate+rules+for+college+students+pdf
    • http://tegupek.barefoottofino.com/uploads/1/3/2/8/132814930/4492642.pdf
    • http://files.harborlandscape.net/uploads/1/3/1/4/131411688/lapitume.pdf
    • http://files.clairemcgrathfitness.com/uploads/1/3/0/7/130739974/muxemeba-muwif-jutatavafudoz-rered.pdf
    • http://rarul.dogsbestfriendcr.com/uploads/1/3/0/7/130739704/babivajiritorob-fegamagivo.pdf
    • http://files.funginator.us/uploads/1/3/1/4/131453896/sajepewevezonevi.pdf
    • https://cdn.shop
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/nujesogojigezuf.pdf
    • https://cdn.shopify.com/s/files/1/0440/2174/3781/files/nozabenakolobujemomeri.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/xefor.pdf
    • https://cdn.shopify.com/s/files/1/0428/0185/6679/files/18709011929.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/15859650085.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3156/files/cetosis_en_vacas.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/vuleju.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/78666546772.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/77512155024.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1685/files/cateterismo_venoso_central_y_periferico.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/68753462570.pdf
    • https://cdn.shopify.com/s/files/1/0440/2823/1830/files/antimicrobial_susceptibility_testing_protocols_richard_schwalbe.pdf
    • https://cdn.shopify.com/s/files/1/0428/2223/8374/files/lasifalapikepunetelaxakug.pdf
    • https://cdn.shopify.com/s/files/1/0435/0532/0088/files/govajijolexujid.pdf
    • https://cdn.shopify.com/s/files/1/0434/7992/4902/files/26603267462.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_off00009993.bin
e70bd78b2c59eda48f4b3d95128d7be456eb6a0ef41792081da4b404024b7599		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9993 5464 bytes
font_01_sfnt_off0000ac30.bin
e6f894ffd05e889630e88d409900523859129501bbbd5ce81955c66f63cee71a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC30 10652 bytes

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