PDF malware analysis — malicious · 13d7c0762ce51124

MALICIOUS

PDF

38.9 KB Created: 2020-09-01 17:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2c40df6186f6c00475fd92206a942030 SHA-1: 676f81c33c9ca5fbc2ac44bc82869d5e1bba8a65 SHA-256: 13d7c0762ce51124fa041b56268e36404fbe67c54bbe0a948ab731851827d414

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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.club/pify?keyword=bise+dik+supply+date+sheet
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0430/4093/1991/files/foliv.pdf
- https://cdn.shopify.com/s/files/1/0434/6114/8837/files/xulagetigugawemu.pdf
- https://cdn.shopify.com/s/files/1/0428/7689/5398/files/87446568759.pdf
- https://cdn.shopify.com/s/files/1/0429/2929/1427/files/76927786062.pdf
- https://cdn.shopify.com/s/files/1/0443/3536/6300/files/oxigenoterapia_enfermagem.pdf
- https://cdn.shopify.com/s/files/1/0434/1107/9317/files/janusz_siuda_gramatyka_angielska_dla_pocztkujcych_chomikuj.pdf
- https://cdn.shopify.com/s/files/1/0434/4096/3751/files/mumetekopizogut.pdf
- https://cdn.shopify.com/s/files/1/0440/2210/4222/files/90513276637.pdf
- https://cdn.shopify.com/s/files/1/0434/4945/0661/files/zifujizagesuwobe.pdf
- https://cdn.shopify.com/s/files/1/0430/6858/8194/files/29589221025.pdf
- https://static.usrfiles.com/ugd/affb4a_c5ac76ee5349482c898cbdfce8510822.pdf
- https://static.usrfiles.com/ugd/b8c837_e7e32b66f6294d6b98eaf0221bf5f332.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00005a83.bin` `4060466815aff6657d778bb3832b3bc34f1b9cda7e0c5a6c32337f12b1c9511e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5A83	5168 bytes
`font_01_sfnt_off00006c21.bin` `6f14b9a0eb222989d5b17209541b0f6f2b03ba246a1a14cd13de0e5e083930dc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6C21	10564 bytes

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