PDF malware analysis — malicious · 4ff32a1746f4f1ee

MALICIOUS

PDF

39.3 KB Created: 2020-08-01 23:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1a31dabde6451510897d46dc6914900b SHA-1: 73dcd6fe73f877a54722b94461579baabc83bb50 SHA-256: 4ff32a1746f4f1eef5ce088598a7189601bba49e4d64cfcb550b712e2f565177

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with a critical heuristic firing for a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body and embedded links suggest a lure to external content, likely for malicious purposes such as phishing or malware distribution.

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=am+i+insane
- http://files.tlghk.org/uploads/1/3/1/6/131637679/xiwomojuxokiwurute.pdf
- http://files.johnmortonministries.org/uploads/1/3/1/8/131857305/1588873.pdf
- http://files.takebackthecoop.com/uploads/1/3/2/6/132681482/lewugonuku.pdf
- http://files.minttocraft.com/uploads/1/3/0/7/130775025/zazasunafejex.pdf
- https://cdn.shopify.com/s/files/1/0437/0753/1432/files/91826580094.pdf
- https://cdn.shopify.com/s/files/1/0437/8044/0215/files/rugofox.pdf
- https://cdn.shopify.com/s/files/1/0431/4500/3169/files/nafulirekaxi.pdf
- https://cdn.shopify.com/s/files/1/0432/1820/6888/files/19070058712.pdf
- https://cdn.shopify.com/s/files/1/0428/9848/9503/files/simple_hangman_java_code.pdf
- https://cdn.shopify.com/s/files/1/0431/0522/2822/files/28447017037.pdf
- https://cdn.shopify.com/s/files/1/0431/5804/4827/files/38689549874.pdf
- https://cdn.shopify.com/s/files/1/0429/9191/1066/files/21465275886.pdf
- https://cdn.shopify.com/s/files/1/0430/6118/2617/files/43524604543.pdf
- https://cdn.shopify.com/s/files/1/0428/5654/6467/files/dusori.pdf
- https://cdn.shopify.com/s/files/1/0436/2862/6080/files/wuzidowagafu.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_off00006015.bin` `57d0c371ec5417833ff1da536810b3359c3d82e8752e47c3f601a1ac0c406fae`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6015	4692 bytes
`font_01_sfnt_off00006ff7.bin` `318be859030980960372ed95401926811fc1c8cea520c54ed205708f0e1107ea`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FF7	9700 bytes

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