PDF malware analysis — malicious · 839e067ad82919e8

MALICIOUS

PDF

39.2 KB Created: 2020-09-16 23:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 017be633cb7c84f53a33348e18a27b5d SHA-1: f6e2ebb62dd0dc8220cc624ab5bf485cff5ca200 SHA-256: 839e067ad82919e8ae21c461a7c0b82b8290810fa31f03fb95c61ace365e9bfd

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains text related to car seat installation and the embedded URLs suggest a link farm or SEO spam campaign, potentially leading to 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.ru/wix?keyword=maxi+cosi+car+seat+installation+front+facing
- http://files.lawsmosis.com/uploads/1/3/1/4/131453698/rilovovodotino.pdf
- http://kijopobo.kellymichellebaker.com/uploads/1/3/0/8/130874679/5673650.pdf
- http://nitoki.rmahf.org/uploads/1/3/0/9/130969332/3641754.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0477/4930/0380/files/worksheet_works_cursive.pdf
- https://01a2633e-7e5c-4a2b-9727-d52a4162fbfc.filesusr.com/ugd/29c71c_bcc2728178d247699237a8c962a7083c.pdf?index=true
- https://b1b63742-80fe-496c-8d95-70e4702451b5.filesusr.com/ugd/9e14ca_84cdaee9a1c944a5bfb5814e937e326f.pdf?index=true
- https://cdn.shopify.com/s/files/1/0434/0921/1549/files/66697378906.pdf
- https://cdn.shopify.com/s/files/1/0460/2131/2671/files/dakodadinafovus.pdf
- https://cdn.shopify.com/s/files/1/0438/0544/2209/files/xupifonat.pdf
- https://cdn.shopify.com/s/files/1/0430/6026/5117/files/lejuvadojubojaxili.pdf
- https://cdn.shopify.com/s/files/1/0463/2467/8813/files/nasofipokubobezarikovi.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_off00005b40.bin` `1c9f2cf15966f4f87774da836a09a9258be98fe74e134ffd17b52f7b19a7acf5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B40	5124 bytes
`font_01_sfnt_off00006ccc.bin` `200bf04cc550188fd04a25ba4c3acb8c2aa2e183972a3a119a61345ec172b171`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CCC	10284 bytes

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