Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6aa7b3a951fd468…

MALICIOUS

PDF

40.9 KB Created: 2020-08-21 08:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc7a4d79bdc9743f0a2f1ae094a5778f SHA-1: 50b47a031b1cb7e2ee8fbd46567af25c7247e0a3 SHA-256: c6aa7b3a951fd468848dfd45068c4db1863637b00b79113d5b1f963982cf7aaa
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.cc', which is known for distributing malware or phishing content. The document body and embedded links also indicate a large number of external PDF links, many hosted on Shopify, suggesting a link farm designed to attract traffic. The ML classifier strongly supports the malicious nature of this PDF.

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=granny+baldi+mod+menu+apk
    • http://files.heidisteller.co.uk/uploads/1/3/1/3/131380966/3495230.pdf
    • https://cdn.shopify.com/s/files/1/0434/2313/7943/files/makuwenijazujaganigasuram.pdf
    • https://cdn.shopify.com/s/files/1/0430/6485/2634/files/70102889802.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/25003017742.pdf
    • https://cdn.shopify.com/s/files/1/0430/1098/2041/files/bilovapuvutusunixavebisa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/19242956418.pdf
    • https://cdn.shopify.com/s/files/1/0431/6240/2965/files/74179165024.pdf
    • https://cdn.shopify.com/s/files/1/0437/4118/4165/files/sony_icd_px333_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/sesabijekisi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2766/0951/files/57537292249.pdf
    • https://cdn.shopify.com/s/files/1/0436/9599/7096/files/weather_report_in_hebbronville_texas.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/budukorujifimebaduguxowod.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_off00004d87.bin
7957377006d766be6231e8112e5e65b3ddf4843865476ecf28ae9834089b4625
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D87 5264 bytes
font_01_sfnt_off00005f61.bin
8ef5a87f154186f0f4f87d6536f1054eaed3d0ba26e4b4bc51f0d39e9c00afad
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F61 9536 bytes
font_02_sfnt_off0000804e.bin
5f800b2c5287a63ef1f99c8661d96b8f7bd849c21fa499a57924680c0e1ca2af
pdf-font-stream PDF embedded font (sfnt) at offset 0x804E 16120 bytes