Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece2d2d5b6dea1e2…

MALICIOUS

PDF

79.8 KB Created: 2020-08-06 05:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18a4c462acba5b6ece135977232cad4e SHA-1: aa3f4c32e68b8db592acff2d535754c1961d29f7 SHA-256: ece2d2d5b6dea1e208bc6b87aa3b9335e45d90cf0a11bdc960d8583f3ed7d2d3
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, includes the same URL, suggesting an attempt to trick users into visiting a malicious site. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely for SEO poisoning or to obscure the final malicious destination. The ML classifier strongly flagged this PDF as malicious.

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/wb?keyword=wire%20cut%20electrical%20discharge%20machining%20pdf
    • http://files.heatherfraser.ca/uploads/1/3/0/8/130814238/67c4eca7110d7c1.pdf
    • http://files.reachatweec.org/uploads/1/3/1/4/131483002/muboxofi-bizax-pirejima.pdf
    • http://minajas.ourcolourfulworld.com/uploads/1/3/1/6/131637814/ec589b332a.pdf
    • http://dekenixas.electrisafebournemouth.co.uk/uploads/1/3/0/7/130775868/wedelodaperejeri.pdf
    • http://files.nmctkd.com/uploads/1/3/0/8/130814397/tubabix.pdf
    • https://cdn.shopify.com/s/files/1/0431/0692/6741/files/64815455570.pdf
    • https://cdn.shopify.com/s/files/1/0437/5927/2090/files/rogefe.pdf
    • https://cdn.shopify.com/s/files/1/0429/1349/7251/files/fogewofenuzuxuve.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/busorugoj.pdf
    • https://cdn.shopify.com/s/files/1/0451/2507/5109/files/fall_armyworm_insecticides.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/33470352805.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0353/files/kofudizajunekuneket.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/18762913408.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/koserozo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8584587797.pdf
    • https://cdn.shopify.com/s/files/1/0436/8770/6774/files/57095951779.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/95416015441.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edc9.bin
680d6f2e165048cefc8d5c79b72050852bdcb13cb970aac75efedd0fb592d02a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC9 5352 bytes
font_01_sfnt_off0000ffdb.bin
fa5183ff405c768631b63866305e2e874fd84cdb689995032e3c4088d64db46b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDB 10424 bytes
font_02_sfnt_off0001237b.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1237B 4324 bytes

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