PDF malware analysis — malicious · 0f123bf7bd93d8f3

MALICIOUS

PDF

40.3 KB Created: 2020-08-03 05:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 869192351cdadb173813e126f0a315a5 SHA-1: 06af967a047b8a7b90b6a11890b60dd8e6800c20 SHA-256: 0f123bf7bd93d8f31d3fa6cb490b9ae3ee58aa3983c56e76f805ac1e5a1f7367

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure related to workout PDFs, but the primary function appears to be redirecting users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=bowflex+dumbbell+workout+pdf
- http://files.zanyunoodles.com/uploads/1/3/0/7/130739381/sikete-wemotuta.pdf
- http://files.fittingroomligonier.com/uploads/1/3/1/3/131379268/wujusuruzasojuwepadu.pdf
- http://files.oranmormead.com/uploads/1/3/1/0/131070230/zonif.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0436/2207/2480/files/romasidorabesuvizi.pdf
- https://cdn.shopify.com/s/files/1/0433/0569/7438/files/xojatefanezezisujakoz.pdf
- https://cdn.shopify.com/s/files/1/0433/5802/7928/files/vakaf.pdf
- https://cdn.shopify.com/s/files/1/0436/9471/9131/files/wadepodonujamop.pdf
- https://cdn.shopify.com/s/files/1/0434/2457/9751/files/lady_gaga_discography.pdf
- https://cdn.shopify.com/s/files/1/0430/4257/0401/files/new_vegas_unofficial_patch_plus.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vazakiliduvapi.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/laxefasigapabaxirasu.pdf
- https://cdn.shopify.com/s/files/1/0434/6642/4486/files/3194430220.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_off00006022.bin` `4524e512c835b5dc89d5cd0312d6b2e71b813ff4393e2d9e5276fc69ebd3ac6a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6022	5212 bytes
`font_01_sfnt_off000071de.bin` `e630771547e42919c54ae8413193e222595db6d5415323fe165e6665c078f131`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x71DE	10168 bytes

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