PDF malware analysis — malicious · 480ca941e8010bdc

MALICIOUS

PDF

43.2 KB Created: 2020-09-01 17:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 15ac76d4885069c73e9219db7a7525e5 SHA-1: cd77036f30ff3c76a274f41945acf286d47c89e6 SHA-256: 480ca941e8010bdc58ecb1fc64f1b3d39842d44f4605fa4ff23427fc43f54149

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=android+users+vs+iphone+users+market+share', which is also listed as a suspicious URL. The presence of a link farm suggests an attempt to distribute or obscure the final malicious destination.

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.ru/wix?keyword=android+users+vs+iphone+users+market+share
- https://static.usrfiles.com/ugd/8ab72e_e47792b8bf2d4993ae7bf0056b7b3ba1.pdf
- https://static.usrfiles.com/ugd/5e8de6_7c9fe712b228473596d698b6ff6c9c7a.pdf
- https://static.usrfiles.com/ugd/0e2875_d064b659d19541d1913479b2cec887e0.pdf
- https://cdn.shopify.com/s/files/1/0430/8733/1481/files/zuvuxefelovela.pdf
- https://cdn.shopify.com/s/files/1/0433/3328/8088/files/vietnam_consumer_finance_market_report_2018.pdf
- https://cdn.shopify.com/s/files/1/0430/9480/2581/files/56716670922.pdf
- https://cdn.shopify.com/s/files/1/0431/5381/7762/files/66603895144.pdf
- https://cdn.shopify.com/s/files/1/0431/8153/9489/files/79980875491.pdf
- https://cdn.shopify.com/s/files/1/0431/3009/3728/files/all_video_er_online_mp4.pdf
- https://cdn.shopify.com/s/files/1/0430/7081/6407/files/teacher_certification_test_study_guide.pdf
- https://cdn.shopify.com/s/files/1/0430/8579/1393/files/81764830459.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_off00006a51.bin` `b4d31ce62b68882d54dbde5570de49fbfb860321f2c938dad787805fa77ca50a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A51	5280 bytes
`font_01_sfnt_off00007c20.bin` `eaea6214ef93f7e4d24339442ab532a15e4e24dc620d660c3bb36874732e1d06`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7C20	10472 bytes

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