Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8f7a86f5e279d0…

MALICIOUS

PDF

43.0 KB Created: 2020-08-31 01:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1c423c5688b4425b7daa38cabdf2bd1 SHA-1: 47464b4c7f91b1640fd59165f9b0852f23bee0a6 SHA-256: 0e8f7a86f5e279d0924b24acabe7f2fa828d9fa3e92e6d2921071a32addbb6d2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body and extracted URLs indicate a lure related to 'black friday kindle fire hd' and a link farm of other PDFs hosted on Shopify. This suggests a phishing or scam attempt to redirect users to malicious content.

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/wix?keyword=black+friday+kindle+fire+hd
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/72186864023.pdf
    • https://cdn.shopify.com/s/files/1/0462/7221/7237/files/xagesoxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1042/3960/files/58070506094.pdf
    • https://cdn.shopify.com/s/files/1/0432/6653/9673/files/jusetogupifozuxasalazivaf.pdf
    • https://static.usrfiles.com/ugd/e2f197_0607020f840340b3a934a0d7a7b302f4.pdf
    • https://static.usrfiles.com/ugd/d3758e_929135a0bf694cf784ada67e81de13bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_e96821df49074073aed284cbbc37b7f2.pdf
    • https://static.usrfiles.com/ugd/b28561_70943d684eea495fb8fe347fc3901349.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0daee0b5c1b41b2a5fcd330edd29c5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_15f594087dc04933bad9918a5812b228.pdf
    • https://static.usrfiles.com/ugd/b8c837_8eb7c0c4a5ac4d84ac2deba233118111.pdf
    • https://static.usrfiles.com/ugd/c7a620_260b0042563d471fb7080d987dce7396.pdf
    • https://static.usrfiles.com/ugd/b8c837_e71e2132e20b4d69be56b8fe8620941c.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006979.bin
b61951080a24fd8373541793fecaa97aae9785c4098f75b8626d08b675e22652
pdf-font-stream PDF embedded font (sfnt) at offset 0x6979 5144 bytes
font_01_sfnt_off00007af8.bin
a20783420d6fbfa0fdf166c2cac431d37d63d2b2513af51623585a6efeb183dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF8 10952 bytes