PDF malware analysis — malicious · 0da4eaeec8c1f326

MALICIOUS

PDF

40.6 KB Created: 2020-08-18 14:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bea6b546ea2cd9501ac631352b8675ca SHA-1: 7fd0e95908e0fc8bf5c32daba73b9796266ce95d SHA-256: 0da4eaeec8c1f326e45e38cee341f504e6a0360a869ce30ad8f45bc88e9f31da

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, indicating a link farm. One of the primary links, 'https://ttraff.cc/pify?keyword=old+bet9ja.+com', is flagged as a malicious redirector. This suggests the document is designed to direct users to potentially harmful content, 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.cc/pify?keyword=old+bet9ja.+com
- http://files.csunphc.com/uploads/1/3/1/8/131859993/migivuzuxoxume_finokazasizibed_disoru_sutiwugu.pdf
- http://files.sentinelshadesystems.com/uploads/1/3/0/8/130813827/c4dfe44.pdf
- http://files.lwbranding.com/uploads/1/3/1/3/131379054/sexinomat.pdf
- http://fufidub.wlcbands.com/uploads/1/3/2/6/132682892/3dfab8b.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22584543347.pdf
- https://cdn.shopify.com/s/files/1/0435/1744/4264/files/16468208359.pdf
- https://cdn.shopify.com/s/files/1/0431/7675/5349/files/gabekutox.pdf
- https://cdn.shopify.com/s/files/1/0431/1692/0996/files/skaven_army_book.pdf
- https://cdn.shopify.com/s/files/1/0434/6006/7480/files/87817279130.pdf
- https://cdn.shopify.com/s/files/1/0437/2581/5959/files/nixobopuximiwawo.pdf
- https://cdn.shopify.com/s/files/1/0435/6617/0271/files/candide_bernstein.pdf
- https://cdn.shopify.com/s/files/1/0430/0416/6297/files/dubavewidukalifi.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_off00005f76.bin` `3a5a56ffddb993a3d8aed48ce71b361a2a75453395b29e25113f81124b94ab81`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F76	5240 bytes
`font_01_sfnt_off0000713d.bin` `2d85d811b8ae3bcce42d4ccb5d74092a9e9f612490585ba5039d8862ecabdc9a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x713D	10836 bytes

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