PDF malware analysis — malicious · 6350d6ee910d7e98

MALICIOUS

PDF

41.3 KB Created: 2020-08-19 09:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 02c91e4818515f7ff1010f16de488a51 SHA-1: 273f1ad84c22bf2ab4f01e04830285cd60ae0de9 SHA-256: 6350d6ee910d7e982c09e9c217fc32d94be7bf1d58dec7d5b09aa64d1ef70b99

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to malicious infrastructure, disguised with a seemingly innocuous keyword. This indicates a phishing or scam attempt, likely delivered as a spearphishing attachment. The PDF also contains a large number of links to external PDFs, suggesting a link farm or SEO manipulation tactic to obscure the malicious redirector. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly suggest a phishing or redirection attack.

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.cc/pify?keyword=digimon+rearise+tier+guide
- http://kaziz.merionethrailwaysociety.com/uploads/1/3/0/7/130776088/c50e64b754627b.pdf
- http://files.stevannovakovich.com/uploads/1/3/0/8/130874241/vewasamomuselus-fifobuwur-leluvogez.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0440/8927/8616/files/mass_drivers_manual.pdf
- https://cdn.shopify.com/s/files/1/0430/7851/6885/files/30330108020.pdf
- https://cdn.shopify.com/s/files/1/0437/8230/8002/files/immutablemap_vs_hashmap_performance.pdf
- https://cdn.shopify.com/s/files/1/0430/6891/5863/files/tokibuwivupuxefesi.pdf
- https://cdn.shopify.com/s/files/1/0451/1747/2922/files/nvs_ldc_exam_2019_answer_key.pdf
- https://cdn.shopify.com/s/files/1/0437/8768/1954/files/caddis_northern_guide_wading_boots_review.pdf
- https://cdn.shopify.com/s/files/1/0430/6511/4775/files/household_linen_sheets_crossword_clue.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006524.bin` `842b63fb92fd7e89a6ba5b973b69bafca8fcb72c24fcdf8ad14eb38ee77c31a2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6524	5112 bytes
`font_01_sfnt_off0000766c.bin` `bc66bc2e041088b350c4d279635dbbbfd1b1770f73ec4497ffe456dfd896873f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x766C	10128 bytes

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