PDF malware analysis — malicious · 3e2f31bd95e2a813

MALICIOUS

PDF

43.8 KB Created: 2020-09-02 05:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2ec2a1eb5798342100a6455491956ea7 SHA-1: 4891df99f5d5159d2a1a1c22c624b3ff48874d3a SHA-256: 3e2f31bd95e2a8135772527b4e2f78aeaf8b332dc6f1bc3931311b9ec943fc45

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a redirector URL, indicating an attempt to drive traffic to malicious infrastructure. The document body, though partially corrupted, suggests a lure related to educational materials. The presence of a redirector link and a link farm points towards a phishing or scam attempt. No scripts were extracted, limiting the analysis of direct payload execution.

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.link/wix?keyword=holt+mcdougal+geometry+1-+1+exercises+answers
- https://cdn.shopify.com/s/files/1/0428/5385/9494/files/winogadetewajijotowuvepa.pdf
- https://cdn.shopify.com/s/files/1/0438/8782/0968/files/hpcl_mittal_energy_limited_annual_report_2017.pdf
- https://cdn.shopify.com/s/files/1/0461/9485/1998/files/totogolakefovipasawiwo.pdf
- https://static.usrfiles.com/ugd/b8c837_8e08d37e535c43a5b82f4c78f1e535e5.pdf
- https://static.usrfiles.com/ugd/1c8c6c_e56918b7770f44d5ac738d982c4ad1db.pdf
- https://cdn.shopify.com/s/files/1/0432/0083/9842/files/nodezawed.pdf
- https://cdn.shopify.com/s/files/1/0438/2697/0786/files/gozitasujasamudemon.pdf
- https://cdn.shopify.com/s/files/1/0464/8216/1816/files/fenelogawelero.pdf
- https://cdn.shopify.com/s/files/1/0430/2353/2195/files/reversing_a_string_in_python.pdf
- https://cdn.shopify.com/s/files/1/0460/5755/4075/files/welomufur.pdf
- https://cdn.shopify.com/s/files/1/0429/6992/3740/files/arrhythmia_ecg.pdf
- https://cdn.shopify.com/s/files/1/0435/4378/9727/files/xafetejidegikafuge.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_off00006ac9.bin` `fd6e6cb97726247e9be2f2bd829e97a5a8fbfe2a32ba85bf66421b619e1858f5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6AC9	5564 bytes
`font_01_sfnt_off00007dc1.bin` `3629fdd3345d71346540f6bd7721750ce16261dcbbf9d82c77e62d8621209bee`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7DC1	10884 bytes

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