PDF malware analysis — malicious · 92316380fbc788b7

MALICIOUS

PDF

38.1 KB Created: 2020-08-17 03:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 08896dc09663810405b5e8075833f182 SHA-1: cd50e8e90a85a9222d20930669f1a75fc8503c34 SHA-256: 92316380fbc788b7e30b8912d5ac87f09419ab8b689937ef3433458ab9d25436

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.com). The ML classifier also strongly flagged this PDF as malicious. The embedded links, including the one to ttraff.com, suggest an attempt to lure users to malicious sites.

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=red+castle+cocoonababy+sheets
- http://topetikab.bostonstreetartgallery.com/uploads/1/3/1/3/131384709/vexopomume-sakazobodijis.pdf
- http://tanasu.woodsinbloom.com/uploads/1/3/1/3/131380505/wewifasikav_vuniruwi_mikibo.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdf
- https://cdn.shopify.com/s/files/1/0431/8131/0114/files/68692553893.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89709194360.pdf
- https://cdn.shopify.com/s/files/1/0435/9772/5864/files/29899471833.pdf
- https://cdn.shopify.com/s/files/1/0437/5799/4138/files/migigixusejuvidokos.pdf
- https://cdn.shopify.com/s/files/1/0430/5040/1943/files/pofokenemagajede.pdf
- https://cdn.shopify.com/s/files/1/0433/2689/8344/files/1233102875.pdf
- https://cdn.shopify.com/s/files/1/0427/5650/5756/files/dibaranaro.pdf
- https://cdn.shopify.com/s/files/1/0429/6038/8262/files/pivetevumegozemeboka.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000048f4.bin` `3bd528d69331282760883f30a439f8920054b551f1a92a5a5add748a15eab4e7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x48F4	4920 bytes
`font_01_sfnt_off000059ad.bin` `43249ed38410dfc948bf13a462ab16460a08805c6dfdbc139528245b91129bc3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x59AD	10552 bytes
`font_02_sfnt_off00007db9.bin` `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7DB9	4324 bytes

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