PDF malware analysis — malicious · 9c8e816dda832cc3

MALICIOUS

PDF

38.7 KB Created: 2020-08-26 09:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: fbe4e11fb12cb73f705b35b6b0e026b9 SHA-1: 36116ece72ada05a59aa3eaa5ce2ba75822d7306 SHA-256: 9c8e816dda832cc3f021776f9856b75d4540715d01bb649624f23fca6865a818

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a string that appears to be a URL related to 'fallout 4 script extender not working', likely a lure. The presence of a link farm heuristic further suggests malicious intent to drive traffic to potentially harmful sites. The primary malicious URL identified is https://ttraff.com/pify?keyword=fallout+4+script+extender+not+working.

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=fallout+4+script+extender+not+working
- http://radufew.swiftfitnwa.com/uploads/1/3/0/7/130775403/3989625.pdf
- https://cdn.shopify.com/s/files/1/0439/2691/3179/files/20902569532.pdf
- https://cdn.shopify.com/s/files/1/0431/2409/7191/files/34609230852.pdf
- https://cdn.shopify.com/s/files/1/0437/5085/0709/files/14822503812.pdf
- https://cdn.shopify.com/s/files/1/0434/6806/2872/files/biochemistry_by_berg.pdf
- https://cdn.shopify.com/s/files/1/0461/1476/7012/files/vavukamebuvi.pdf
- https://cdn.shopify.com/s/files/1/0431/5742/2240/files/1179264343.pdf
- https://cdn.shopify.com/s/files/1/0433/9164/7894/files/genesis_bible_summary.pdf
- https://cdn.shopify.com/s/files/1/0463/0396/9437/files/rabikugivarisofogotasiw.pdf
- https://cdn.shopify.com/s/files/1/0429/0406/0071/files/contact_us_page_template_bootstrap.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_off00005901.bin` `95b0d8f3e83ea78ef4104db381d65eb80bf96d7bb4ac8ef3d664815606344f9b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5901	5508 bytes
`font_01_sfnt_off00006bf9.bin` `28ade82eb25d6d96ee8db9b7b2dfab47d437305bd9d5e4acf1393b6e080a19fb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6BF9	10096 bytes

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