PDF malware analysis — malicious · 751d38f9eca6424d

MALICIOUS

PDF

102.4 KB Created: 2020-09-10 05:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9f58ec526dbb35fbac7de8da28776a19 SHA-1: fd929ad926f2f7a4869f2eeb6538a4ee33062717 SHA-256: 751d38f9eca6424d15b98ba34dc1d4af00e46a0e7683ecd215728f9f732c644d

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that point to a known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of the URL 'https://ttraff.com/wb?keyword=staph%20aureus%20infection%20pdf' strongly suggest a phishing or scam attempt. The document body, though partially corrupted, also contains this URL, reinforcing its malicious intent. No scripts were extracted, but the embedded links are sufficient to classify this as a malicious document.

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/wb?keyword=staph%20aureus%20infection%20pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_e0120433f8ed46b1b7e740f4ad7a52f0.pdf
- https://static.usrfiles.com/ugd/f459ea_0b66556ba66a4626a1c6e4250ef219bf.pdf
- https://static.usrfiles.com/ugd/c0a468_2657727069404f0885f476545c90e402.pdf
- https://cdn.shopify.com/s/files/1/0428/6559/0438/files/83565851939.pdf
- https://cdn.shopify.com/s/files/1/0433/3725/3023/files/70283971936.pdf
- https://cdn.shopify.com/s/files/1/0437/4603/3818/files/bodybuilding_dumbbell_workout.pdf
- https://static.usrfiles.com/ugd/54b9a1_5297792b3b87430bb47d3bf63c64d3db.pdf
- https://static.usrfiles.com/ugd/40b9e6_c4d29e0289584543abdbb485606346a3.pdf
- https://cdn.shopify.com/s/files/1/0437/8407/7473/files/givuzo.pdf
- https://cdn.shopify.com/s/files/1/0465/4733/7374/files/xizexinug.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_off00014ecb.bin` `841cdbf4dea823f0091111a8c0d7267adf480137732adc22f772ed560a4040a8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14ECB	5316 bytes
`font_01_sfnt_off000160d7.bin` `ef0b887b3c4589967533c14bce13c17e6e60daacec393b3e907b4300e3b90f68`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x160D7	13864 bytes

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