PDF malware analysis — malicious · ca76e82da7b5b4c2

MALICIOUS

PDF

46.8 KB Created: 2020-08-05 11:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 114c103273ea9f2fe6e9c0c9b5f4fb38 SHA-1: 2630ca2af1d0485d11768a9d39801715f0a92572 SHA-256: ca76e82da7b5b4c207b94807a3a92a824df313b04cc5fc0a199f1fb96f43de20

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be a lure to click on a malicious link, likely for 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=makalah+logam+alkali+tanah+pdf
- http://files.pippaspilatesstretch.com/uploads/1/3/2/8/132814241/rebiwogafamujoba.pdf
- http://files.thecostaricakid.com/uploads/1/3/2/6/132681698/tifomi.pdf
- http://files.kristindraws.com/uploads/1/3/2/6/132682790/8864243.pdf
- https://cdn.shopify.com/s/files/1/0430/8870/7733/files/37880462138.pdf
- https://cdn.shopify.com/s/files/1/0440/7833/4117/files/26968838158.pdf
- https://cdn.shopify.com/s/files/1/0428/6359/1583/files/nefuziberedisotenukomuno.pdf
- https://cdn.shopify.com/s/files/1/0438/2395/6125/files/kebuweji.pdf
- https://cdn.shopify.com/s/files/1/0430/4325/8522/files/lapavavegovak.pdf
- https://cdn.shopify.com/s/files/1/0434/3765/4178/files/kuduzogive.pdf
- https://cdn.shopify.com/s/files/1/0437/9662/7616/files/64473625894.pdf
- https://cdn.shopify.com/s/files/1/0429/3555/0118/files/54370643881.pdf
- https://cdn.shopify.com/s/files/1/0431/4831/2730/files/oblivion_race_mods.pdf
- https://cdn.shopify.com/s/files/1/0428/5906/9599/files/xozonubuvutizege.pdf
- https://cdn.shopify.com/s/files/1/0432/7122/5494/files/46447229930.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_off00007a3c.bin` `f497766b4203273b57d51212928819c52ea1be9268d49f59d491271c77e6a053`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A3C	5248 bytes
`font_01_sfnt_off00008c07.bin` `03ea7a193bc1dcdb7f64617feb693d6a025119e68db6ed9826109fac5bf09fb3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C07	9920 bytes

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