PDF malware analysis — malicious · 83e587d7270d4099

MALICIOUS

PDF

44.0 KB Created: 2020-08-20 22:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d6ae8ec7356948e699b4a78972ecaac7 SHA-1: 2314c61cc6b22c3138406e80c8a7e371b419eee8 SHA-256: 83e587d7270d40990ed4bdff616027698f0ade879a64ed1eb00ad8e37f638189

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same URL and references to software downloads, suggesting a lure to entice users to click the malicious link. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine visibility for the malicious content.

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=cubase+5+kuyhaa
- http://sitaza.swcfcu.org/uploads/1/3/2/3/132302780/5682287.pdf
- http://files.bigtreelabel.com/uploads/1/3/0/8/130814308/3068743.pdf
- https://cdn.shopify.com/s/files/1/0436/0473/8206/files/35973141741.pdf
- https://cdn.shopify.com/s/files/1/0438/1373/2512/files/food_evaluation_sheet_ks2.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45397061855.pdf
- https://cdn.shopify.com/s/files/1/0435/6335/2227/files/satavupub.pdf
- https://cdn.shopify.com/s/files/1/0433/4714/8950/files/trainer_for_blades_of_time_pc.pdf
- https://cdn.shopify.com/s/files/1/0432/4704/2715/files/uke_song_chords.pdf
- https://cdn.shopify.com/s/files/1/0431/2072/2080/files/bikini_body_guide_workout.pdf
- https://cdn.shopify.com/s/files/1/0444/2020/2663/files/13816085549.pdf
- https://cdn.shopify.com/s/files/1/0433/8027/7406/files/39288336187.pdf
- https://cdn.shopify.com/s/files/1/0428/5261/4311/files/vuzowuv.pdf
- https://cdn.shopify.com/s/files/1/0429/9590/8761/files/22192084650.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_off000065a1.bin` `aad1609490a4bc6f099fca8a1a4f65660754520952f4eee3812b8098ff09c3cf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65A1	4980 bytes
`font_01_sfnt_off00007697.bin` `60d04eda36c5a4d31c406839d9d9289ca93bc2b123408d8410d9392b4b2f4296`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7697	14464 bytes

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