PDF malware analysis — malicious · 4e755578f9acacdf

MALICIOUS

PDF

38.1 KB Created: 2020-08-31 17:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2fe35ff483560a9d7f30a9a4a253e65f SHA-1: 813e58aaa7d8a9fbf634adfb3544015e74b6c1e0 SHA-256: 4e755578f9acacdf47e5ea75ba9281526e0eaa821088483255c203fa933c0508

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1200 Hardware Addends T1059.001 PowerShell

The PDF contains a large number of embedded URLs, including a link to a known malicious redirector at 'https://ttraff.club/wix?keyword=ssb+batch+number+format'. This indicates a likely attempt to lure the user to a malicious website for phishing or malware delivery. The ML classifier also 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.club/wix?keyword=ssb+batch+number+format
- https://cdn.shopify.com/s/files/1/0431/5018/0512/files/dimowula.pdf
- https://cdn.shopify.com/s/files/1/0429/0471/5427/files/xolopukulupiwugadisaxaw.pdf
- https://cdn.shopify.com/s/files/1/0440/6162/2437/files/rational_choice_theory_2020.pdf
- https://static.usrfiles.com/ugd/b8c837_729f1392a6704275a923f1451ad5518e.pdf
- https://static.usrfiles.com/ugd/f1d680_d265a8e48a6c487b9fa528eced5f87f8.pdf
- https://static.usrfiles.com/ugd/2f8cea_7caffc2ff2534e66b4f2b5e716259550.pdf
- https://static.usrfiles.com/ugd/271e65_b4cf1b122e0f4b82b953d184d93c3435.pdf
- https://static.usrfiles.com/ugd/704566_dcf1de7adb0742949781d942821cbbc1.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zijilo.pdf
- https://cdn.shopify.com/s/files/1/0452/4104/1057/files/d_d_online_character_sheet.pdf
- https://static.usrfiles.com/ugd/225520_c2cead60abb34e4095ce52d01abb866d.pdf
- https://static.usrfiles.com/ugd/33c377_b1eee0df0bdb47eda6e3edb017428d61.pdf
- https://static.usrfiles.com/ugd/ce14f3_a3e3624c3aa94691971bc6c5f43dae12.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_off000055a5.bin` `da06168d6d7825922919cb225e18ceab74bcb8b05a0117e7cb08fd8ced96ab3f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x55A5	5332 bytes
`font_01_sfnt_off0000679e.bin` `12cd03d07623d843a941cd11219eb007677bca3ef99ba7c44e115db860f40ed1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x679E	10604 bytes

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