PDF malware analysis — malicious · 047784971176514c

MALICIOUS

PDF

38.3 KB Created: 2020-09-01 06:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: fc23903030bb27a1f42d2d17b4664ee5 SHA-1: b348ff62922073fa9addb9fde148895b89efb7f7 SHA-256: 047784971176514c5198e4ef6d5fa3232501202e9c14cb5d3264e2e7678ee951

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains URLs that likely serve as lures to phishing or malware download sites. The presence of a malicious redirector suggests an attempt to lead the user to a compromised or malicious destination.

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.cc/wix?keyword=histopathology+report+example
- https://www.cancer.go
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0430/1714/2433/files/zibub.pdf
- https://cdn.shopify.com/s/files/1/0469/0775/2608/files/iaap_certified_administrative_profes.pdf
- https://cdn.shopify.com/s/files/1/0429/9646/5823/files/bivileju.pdf
- https://cdn.shopify.com/s/files/1/0434/5747/8809/files/23227248149.pdf
- https://static.usrfiles.com/ugd/a59130_f474faa71f59431393df5eea7f3f7ad6.pdf
- https://static.usrfiles.com/ugd/33a16d_fbef701c63364750bee97d4b1996beab.pdf
- https://cdn.shopify.com/s/files/1/0436/2502/1603/files/network_diagram_download.pdf
- https://cdn.shopify.com/s/files/1/0439/1275/7400/files/podupu.pdf
- https://cdn.shopify.com/s/files/1/0430/6393/5129/files/mikedizorele.pdf
- https://static.usrfiles.com/ugd/09273f_7084d71aa59f48159d002e765d2aaf82.pdf
- https://static.usrfiles.com/ugd/b8c837_c274e91da040459b9796b3f7d95bebb5.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_off000057e3.bin` `93c17843e8486b93802504c0ddbf7be1cf69b795999fdd5788184d822cb6fa07`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x57E3	5364 bytes
`font_01_sfnt_off00006a02.bin` `223ccec3446efb9ff792933aead9b69a900b239b9ee57ecb2f7b79c4b9e49e1a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A02	10192 bytes

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