PDF malware analysis — malicious · 435c190378317b88

MALICIOUS

PDF

48.2 KB Created: 2020-08-13 01:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b3ea6a61a01d7b499c9de2325d8ba53f SHA-1: 670bbd186a046cdc8d7ce7d9271789834756c329 SHA-256: 435c190378317b885c8d4fd34f18ec5dfe317acef3530464a09c2a6485c8d258

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high volume of embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate this PDF is designed as a malicious redirector and part of a link farm. The ML classifier strongly supports the malicious nature of this document.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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/wb?keyword=technological%20devices%20pdf
- http://files.sproutsmyanmar.com/uploads/1/3/2/3/132302863/giburapudiga-dojowul.pdf
- http://kelawugup.akirby80.net/uploads/1/3/0/7/130775181/3563319.pdf
- http://files.crosscountryfarm.net/uploads/1/3/0/9/130969922/teremotite-rofad-wumazujowojenem.pdf
- https://cdn.shopify.com/s/files/1/0431/7321/6411/files/gajavugoledevalawa.pdf
- https://cdn.shopify.com/s/files/1/0436/9799/5941/files/74664505468.pdf
- https://cdn.shopify.com/s/files/1/0432/6657/2452/files/english_language_placement_test.pdf
- https://cdn.shopify.com/s/files/1/0449/9632/9636/files/basic_english_tenses.pdf
- https://cdn.shopify.com/s/files/1/0427/5362/2182/files/34351689351.pdf
- https://cdn.shopify.com/s/files/1/0434/6842/3330/files/gifamivivajubosukusofuj.pdf
- https://cdn.shopify.com/s/files/1/0431/4592/0669/files/arco_asvab_study_guide.pdf
- https://cdn.shopify.com/s/files/1/0453/8872/6440/files/topukajebakaz.pdf
- https://cdn.shopify.com/s/files/1/0429/0294/5959/files/mabexinonoteneniwadibum.pdf
- https://cdn.shopify.com/s/files/1/0432/5795/4464/files/puzunibasowatavab.pdf
- https://cdn.shopify.com/s/files/1/0435/2563/6248/files/tiwegepusabonawosinubovib.pdf
- https://cdn.shopify.com/s/files/1/0437/7313/2961/files/robinhood_api_python.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22584543347.pdf
- https://cdn.shopify.com/s/files/1/0436/0824/4381/files/cardinal_numbers_in_english.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujaxitedidubabupopivup.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_off00007d34.bin` `31c51e425395673d8158dfe7954dfb26c1103ccb01aedd9606c13ec2637767c5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7D34	5332 bytes
`font_01_sfnt_off00008f57.bin` `8e65f2885b6289f3ae71912d3e965a252c302541a859820ab40fa604b957debc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F57	10820 bytes

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