PDF malware analysis — malicious · 377b43588ee54807

MALICIOUS

PDF

46.5 KB Created: 2020-08-21 04:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c7c42579b6663d3d5f59c272d3677036 SHA-1: 448e0a53cbf6d745ef0c0d4617b5dd75ceab1032 SHA-256: 377b43588ee54807462c49afff1529a60e0494678f53025d721efa6f4cb45c86

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body references 'Diablo 1 belzebub mod', suggesting a lure to entice users to click the malicious link. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive 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/pify?keyword=diablo+1+belzebub+mod
- http://fenamam.marlobartels.com/uploads/1/3/0/8/130814328/zijugujefewi_vufegitela_nafasesuriga.pdf
- http://galeze.nysfcja.org/uploads/1/3/1/4/131483027/bb744a6ae1c5765.pdf
- http://bokowetag.gerdesgala.com/uploads/1/3/0/7/130775129/kuzepibivolimuk_kilopulok_paludelapereg.pdf
- https://cdn.shopify.com/s/files/1/0431/1806/7866/files/37858223397.pdf
- https://cdn.shopify.com/s/files/1/0447/9628/0983/files/hunger_games_vol_1_ita.pdf
- https://cdn.shopify.com/s/files/1/0430/8120/3861/files/27143461902.pdf
- https://cdn.shopify.com/s/files/1/0432/3550/8392/files/nitenopipunafokovulo.pdf
- https://cdn.shopify.com/s/files/1/0438/0524/5597/files/sogajefamibuxa.pdf
- https://cdn.shopify.com/s/files/1/0434/7484/5858/files/vocabulary_worksheet_maker.pdf
- https://cdn.shopify.com/s/files/1/0432/9802/9733/files/san_andreas_mod_installler.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_off00006bfd.bin` `2e6560018d7ccb3a8aa5e6dbf84d4b120d651ad0e395dc63322c4d194cbbb936`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6BFD	4636 bytes
`font_01_sfnt_off00007bc0.bin` `7ab8711610e8a22c118b4f9ce65b298cda6692f40870c7aed0761ddebb812cdb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7BC0	10540 bytes
`font_02_sfnt_off00009fc3.bin` `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9FC3	4324 bytes

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