Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa156e4954f723e2…

MALICIOUS

PDF

46.2 KB Created: 2020-08-21 19:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d72f5db3e00e14485b6e93b64fc33329 SHA-1: f2fba0859c073e80db315e4d8b032b65630ac379 SHA-256: aa156e4954f723e2158c3be5ade7b3aeb6cfb081ef1a2f39a1f5731396320498
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a download for 'Asphalt 10 mod apk'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the target URL and references to the application. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or downloads.

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/pify?keyword=asphalt+10+mod+apk
    • http://dosexaze.highwaysnhoofbeats.com/uploads/1/3/0/7/130775961/98a0410bcb19756.pdf
    • http://files.churchofchristncss.com/uploads/1/3/0/7/130775431/6407947.pdf
    • https://cdn.shopify.com/s/files/1/0437/8719/0434/files/79186566311.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/penyebab_bisul.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9287/files/gepave.pdf
    • https://cdn.shopify.com/s/files/1/0432/4877/9426/files/logic_gate_circuit_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0430/7946/7170/files/xarogifiporigerowo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7478/1338/files/88453526573.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/72926913178.pdf
    • https://cdn.shopify.com/s/files/1/0439/2475/0491/files/44795302771.pdf
    • https://cdn.shopify.com/s/files/1/0435/5604/4955/files/zezupekid.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/blackmail_song_dj.pdf
    • https://cdn.shopify.com/s/files/1/0435/4460/8932/files/tripartite_guidelines_on_fair_employment_practices.pdf
    • https://cdn.shopify.com/s/files/1/0434/4925/4050/files/bridal_chorus_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/62553788755.pdf
    • https://cdn.shopify.com/s/files/1/0436/5955/9065/files/zitipifujo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006900.bin
8a52b8ba5d3a94890e98c5bce89c67dee7513cec40f094097ed6f4be8cd3d43e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6900 4864 bytes
font_01_sfnt_off00007985.bin
817b55b905a1adee5e84ca94c3e99d47ede613a329d2d1ecb85b6b79e8c6d625		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7985 10792 bytes
font_02_sfnt_off00009df1.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DF1 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.