Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b9ff5786f01fd4d…

MALICIOUS

PDF

51.4 KB Created: 2020-08-31 06:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce77f2744f5587d41a2a4c0127e58a06 SHA-1: 3d9c44403c1097e4b9a93d5fade31893bb89a02a SHA-256: 6b9ff5786f01fd4d95c1a4791b48e4c706874ae84275f4a04a7011f50243b50e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the target URL and appears to be a lure related to a laptop review. 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/wix?keyword=hp+15+bs191od+laptop+review
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_49215ce896c84ea9bc3c71259407e086.pdf
    • https://static.usrfiles.com/ugd/b8c837_eab64c9ed9e54033973e97e9cf7650f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_dcf45b131d3d4d79b208d929330b5bc1.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e844fd66b614d48941a244671bb6e6c.pdf
    • https://static.usrfiles.com/ugd/704566_887ba0eacb9f41d9bba73c206671cecb.pdf
    • https://static.usrfiles.com/ugd/e4a001_a118a616b81b4615871b9bee93f12eff.pdf
    • https://static.usrfiles.com/ugd/15ebe2_022fb717f681467ba5c0e1581fba9f8d.pdf
    • https://static.usrfiles.com/ugd/b8c837_394a5068d7e449e1b1c9c88527e82da4.pdf
    • https://static.usrfiles.com/ugd/3ce946_790419b932934504b665ece3849d970d.pdf
    • https://cdn.shopify.com/s/files/1/0440/8023/4661/files/understanding_reliability_and_validity_in_qualitative_research.pdf
    • https://cdn.shopify.com/s/files/1/0430/7704/2337/files/42494102266.pdf
    • https://cdn.shopify.com/s/files/1/0431/1010/5255/files/fixewukedefubirup.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/147219498.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/rogipewegizejasabudi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3198/5309/files/porisilofafasarezebe.pdf
    • https://cdn.shopify.com/s/files/1/0440/7849/7944/files/lojemezo.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_off00007ffe.bin
7c381fa0689b0c177f1865cd7593861a8d8506f53dd18e0eeae7477a2e3024d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFE 5540 bytes
font_01_sfnt_off000092eb.bin
2ff8c6ab12eaa1c38065afd174c45ab1e11f27e4dc6bf55215db247f54c8f1a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x92EB 15040 bytes