PDF malware analysis — malicious · d93fffe583cb9356

MALICIOUS

PDF

41.5 KB Created: 2020-08-09 10:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ac4e1c244ff2879e5e16cb2bbddb828d SHA-1: def48706daddc1d80f596f9b45f4b7f1519c68e9 SHA-256: d93fffe583cb9356abc7fa7ac8f080bd0031943b878d019091a86b71c8597040

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to traff.ru, a known malicious redirector. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=catholic+prayer+book+pdf+download, confirming the redirection attempt.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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.ru/pify?keyword=catholic+prayer+book+pdf+download
- http://jepopadat.allegrodancemusic.com/uploads/1/3/1/4/131453574/nafunupafixeno_xiwepes_kewajiwuropi.pdf
- http://files.roccitytumblers.com/uploads/1/3/2/6/132696030/8972275.pdf
- http://vatije.hannesjacobsviolins.com/uploads/1/3/0/8/130874254/5052587.pdf
- http://files.8utennisacademy.org/uploads/1/3/2/7/132712080/duxonakinuxowi-lajimitolomat-lalejuzu-mafaduduvuki.pdf
- http://files.gatesphoto.net/uploads/1/3/0/7/130738758/2be834a94ece.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64238793182.pdf
- https://cdn.shopify.com/s/files/1/0438/3683/3954/files/anestesia_geral_tipos.pdf
- https://cdn.shopify.com/s/files/1/0438/2107/2541/files/avanged_sevenfold_dear_god_lyrics.pdf
- https://cdn.shopify.com/s/files/1/0431/5247/4280/files/26179914993.pdf
- https://cdn.shopify.com/s/files/1/0431/1177/6416/files/suwekibesuze.pdf
- https://cdn.shopify.com/s/files/1/0440/0611/3430/files/92985448415.pdf
- https://cdn.shopify.com/s/files/1/0430/6095/3249/files/81793304551.pdf
- https://cdn.shopify.com/s/files/1/0431/9110/7752/files/pujojuxolanarikub.pdf
- https://cdn.shopify.com/s/files/1/0430/1537/2953/files/70959712477.pdf
- https://cdn.shopify.com/s/files/1/0431/9376/1941/files/75424182510.pdf
- https://cdn.shopify.com/s/files/1/0438/2500/4706/files/ansys_fluent_meshing_tutorial.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006315.bin` `ed4bd4c4884004cb4a862408b2f65d59024ead0d1d23ffaacedf55f436bbc4eb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6315	5368 bytes
`font_01_sfnt_off00007565.bin` `4fad57fe1d715e77a75a1f54b00cb807468577d1f5d96c37ad588f666f9a7ebc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7565	10272 bytes

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