PDF malware analysis — malicious · d27bc8fa715a9255

MALICIOUS

PDF

45.1 KB Created: 2020-09-01 14:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 28798e960db4cbddd8c91341a3397c7c SHA-1: bd23c03d100c539fd3d5edbf333c7dd794014f11 SHA-256: d27bc8fa715a9255c9c3d74429ae3dca1bdd5903cc9011365a25eff0e2091961

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains references to asbestos awareness and includes the malicious URL. The presence of a PDF link farm further suggests an attempt to manipulate search engine results or distribute malicious links. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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/wix?keyword=asbestos+awareness+toolbox+talk+free
- https://static.usrfiles.com/ugd/4d935e_8f4a844c594844c9b80ff191096fffc2.pdf
- https://static.usrfiles.com/ugd/b8c837_59435c987f8843dbb520fb792944f9ce.pdf
- https://static.usrfiles.com/ugd/79e0dc_e21c90bd77414ce4947d83ef3d4cbf6a.pdf
- https://static.usrfiles.com/ugd/b8c837_d86841b94df94878bc8ce70eb735a604.pdf
- https://static.usrfiles.com/ugd/b8c837_cade67cea84a41fc9e88258cc3f9f00a.pdf
- https://cdn.shopify.com/s/files/1/0435/1610/0776/files/absceso_perianal_manejo_antibiotico.pdf
- https://cdn.shopify.com/s/files/1/0428/9848/9503/files/topical_bible_study_outlines.pdf
- https://cdn.shopify.com/s/files/1/0430/3618/0634/files/85967860120.pdf
- https://cdn.shopify.com/s/files/1/0438/5210/3842/files/44490476461.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.

Filename	Kind	Source	Size
`font_00_sfnt_off000064a2.bin` `58d1e509700af089d6b3e394f818a9c7dc79d24c0da921909493196e374fb228`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64A2	4856 bytes
`font_01_sfnt_off00007539.bin` `43a188b446264abdd01f173357591da33e1f4d75e45e0b3bade0fd74f10a2de1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7539	10796 bytes
`font_02_sfnt_off00009a10.bin` `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9A10	4324 bytes

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