Malicious PDF — malware analysis report

Static analysis result for SHA-256 03166d5eef789ce8…

MALICIOUS

PDF

49.4 KB Created: 2020-08-12 01:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36c0450e8c9e531f32d019537da35170 SHA-1: 4c9d8b1f9778e41d0502a68863a9b57b4c7a463f SHA-256: 03166d5eef789ce8d50cc8ed8a7224c554c9b0ea181f1e87458b2fdfb4da1cbc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one prominent URL leading to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a PDF about psychological trauma theory, likely a lure. The presence of multiple external links, many pointing to Shopify domains, suggests a link farm or SEO poisoning attempt to drive traffic to malicious infrastructure.

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.com/pify?keyword=psychological+trauma+theory+research+practice+and+policy+pdf
    • http://netinib.winebusinesssolutions.net/uploads/1/3/0/8/130814174/pojebeletopoda.pdf
    • http://kagon.easytobuyahouse.com/uploads/1/3/1/3/131379803/raxexobina-vodegobi-doranimo-jikakudati.pdf
    • http://files.aging-success.com/uploads/1/3/1/6/131606965/38c3840a5.pdf
    • http://files.helsbellshandmade.com/uploads/1/3/2/7/132712324/bozoduvaduku_pumilib_bukoluwokam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/xofokidunaratadoduk.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4214/files/27000444134.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3760/files/winchester_model_12_for_sale.pdf
    • https://cdn.shopify.com/s/files/1/0430/2821/8010/files/7850061770.pdf
    • https://cdn.shopify.com/s/files/1/0428/1335/8247/files/xovelafariforel.pdf
    • https://cdn.shopify.com/s/files/1/0431/0774/5958/files/30395957501.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/double_take_yify_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0428/7542/0835/files/59124320991.pdf
    • https://cdn.shopify.com/s/files/1/0433/0510/7620/files/58021044911.pdf
    • https://cdn.shopify.com/s/files/1/0428/0451/0887/files/cinematography_terms.pdf
    • https://cdn.shopify.com/s/files/1/0430/7563/3306/files/72709388468.pdf
    • https://cdn.shopify.com/s/files/1/0431/1092/4437/files/15982909337.pdf
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/zuwaw.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008162.bin
e268b6ba703b0f52a07f02edbfe11fc11badd9d46b2f251b51a960621d81804d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8162 5672 bytes
font_01_sfnt_off00009488.bin
3dc212a258ee7e772c890981518f9c8943e4ad5c4cfb5dc68837b14eff0c0994		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9488 10392 bytes

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