PDF malware analysis — malicious · 6586d429a9c3b214

MALICIOUS

PDF

42.9 KB Created: 2020-08-18 17:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 5866ad4356ff19a594c44361563985e3 SHA-1: 7563c21cfd01968a74e3fb03795083f2c774e4fa SHA-256: 6586d429a9c3b2146ee995cee0dc91cdced15c02dc1577dc9c366bb69fc67c2c

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, including a critical redirector URL, designed to lead users to malicious infrastructure. The document body and heuristics indicate a lure related to 'pdf naar word macbook air', suggesting a phishing attempt to trick users into visiting the malicious site. No scripts were extracted, but the presence of numerous external links points to a link farm or redirection strategy.

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=pdf+naar+word+macbook+air
- http://files.bigfootyarn.com/uploads/1/3/1/8/131857383/xusovetagi-pasitinebofe-nogufakudapinod.pdf
- http://zenit.pencilworksbyjoyce.com/uploads/1/3/2/7/132712324/vafev.pdf
- http://files.goldenstandardimport.com/uploads/1/3/1/6/131637136/a0b507.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0432/4874/6651/files/136221467.pdf
- https://cdn.shopify.com/s/files/1/0427/9340/2534/files/53084966430.pdf
- https://cdn.shopify.com/s/files/1/0431/2412/9952/files/bokizasugebagisatatu.pdf
- https://cdn.shopify.com/s/files/1/0438/9348/9832/files/brain_out_game_level_22_answer.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xajubebajodefemun.pdf
- https://cdn.shopify.com/s/files/1/0431/7249/5524/files/40110148941.pdf
- https://cdn.shopify.com/s/files/1/0430/7877/9029/files/93072468805.pdf
- https://cdn.shopify.com/s/files/1/0438/0708/0610/files/small_merge_split.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_off000063d5.bin` `323f3b74aae10f74b476754a0905a41187736ec73ed1c8ff4e79ef317942d7bb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x63D5	5252 bytes
`font_01_sfnt_off000075aa.bin` `6801db2e608bbdc8a1e96cab76d9875e22187eefedb16d32c2dcdfef6b946e62`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x75AA	13080 bytes

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