Malicious PDF — malware analysis report

Static analysis result for SHA-256 c53016d42741317d…

MALICIOUS

PDF

34.8 KB Created: 2020-08-16 19:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35888376983dadabc85bb171b9a6433d SHA-1: aadbc4ffc53e22ff801e8cc7e511c363913fb35a SHA-256: c53016d42741317d1a6270081c75bb4d83e6fe3c006e2cd944b523f58e0ee022
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical redirector link to ttraffic.com, which is known malicious infrastructure. The document body, though heavily obfuscated, contains text related to a garage door opener manual, suggesting a lure to entice users to click the malicious links. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=allister+type+2+garage+door+opener+manual
    • http://files.sanchezartgallery.com/uploads/1/3/1/3/131383323/5318c4.pdf
    • http://files.whitneykimpton.com/uploads/1/3/1/8/131871692/7010048.pdf
    • https://cdn.shopify.com/s/files/1/0440/2076/0741/files/bvg_map.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/tazinitorozezudeduvut.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/14913980673.pdf
    • https://cdn.shopify.com/s/files/1/0429/2132/8807/files/8222485262.pdf
    • https://cdn.shopify.com/s/files/1/0440/2397/2005/files/bumuroxekuvif.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/fusunotupo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/nutapukagomixexepefomufag.pdf
    • https://cdn.shopify.com/s/files/1/0438/2566/0066/files/alstonia_scholaris_medicinal_uses.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/57012323166.pdf
    • https://cdn.shopify.com/s/files/1/0433/3420/5590/files/kokusijewo.pdf
    • https://cdn.shopify.com/s/files/1/0439/2553/6936/files/bollywood_film_dj_song.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1581/files/63131712934.pdf
    • https://cdn.shopify.com/s/files/1/0432/7486/2758/files/68685704303.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.

FilenameKindSourceSize
font_00_sfnt_off0000494e.bin
5148c7f9fe29eb4eb7157b919ca15233f6cabd6faa8234c35ee927e02f2dbe83
pdf-font-stream PDF embedded font (sfnt) at offset 0x494E 5504 bytes
font_01_sfnt_off00005bea.bin
2c6ddfb9618923c129ea71ddd8292b46154ed0f539e6339a07687a0cebde3137
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEA 10128 bytes