Malicious PDF — malware analysis report

Static analysis result for SHA-256 586f1b55dcaaa775…

MALICIOUS

PDF

46.8 KB Created: 2020-09-20 21:37:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd1db3d22706cb705749cf372f0aa7c7 SHA-1: cdef1facac6a48f9af4c427438abb26d58cf3f93 SHA-256: 586f1b55dcaaa775368e9f309206cbe275e8a283447678fce73658ce2a4e64d4
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=get+your+ex+back+super+system+pdf'. This URL is embedded within the document body, suggesting a social engineering lure. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the malicious destination.

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.me/wix?keyword=get+your+ex+back+super+system+pdf
    • https://cdn.shopify.com/s/files/1/0447/9025/1681/files/75823082868.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/black_s_law_dictionary_9th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/8188/4067/files/xarukilokifevusuf.pdf
    • https://cdn.shopify.com/s/files/1/0479/6861/6611/files/bukatigoze.pdf
    • https://cdn.shopify.com/s/files/1/0435/7678/7103/files/49056513125.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/72209535921.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/bukoludozowunipuranojedup.pdf
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/15456937527.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/baby_photo_album_design_templates.pdf
    • https://be34fae5-c01f-42b5-904b-3ea000642b82.filesusr.com/ugd/d7ba0f_4b990419c87345458028c4975e81efd3.pdf?index=true
    • https://0f27388e-a5b1-4984-a45d-5496031845b7.filesusr.com/ugd/b98abb_119e3c8c93ed4e9397ba8bebffbdbb50.pdf?index=true
    • https://d95e290a-78ef-4335-9991-cf56211bb88c.filesusr.com/ugd/f4de5e_25bf37d913c8440f88ce72bfb00b7565.pdf?index=true
    • https://1c28fe7f-6199-433b-be5a-2abcee7faf45.filesusr.com/ugd/b926a8_0cc8eebe91054679aef8715c4589133c.pdf?index=true
    • https://cca947d7-c058-42f4-80fe-1a11b89b1323.filesusr.com/ugd/dcf311_2092f8d986394d2f8018373259c3395e.pdf?index=true
    • 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_off000078d8.bin
db81852584102e0d64e9bbb2021f844b11f8e9f3da6d94b2cddffc85fef6b9a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D8 5676 bytes
font_01_sfnt_off00008c20.bin
eea6176ddaf080478ee2bcc6862d741991c305d09fb63c53d734caebee2cc081		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C20 10104 bytes

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