Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd01bcf9d2ff5f8…

MALICIOUS

PDF

41.8 KB Created: 2020-08-29 14:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4e05b042d65cd064ec6f0235ea6f764 SHA-1: 7aa7a34c5a6f951431e22133a0e483d3cf895fd8 SHA-256: 9dd01bcf9d2ff5f80e31672e7a305c7b528db42500322f9636d76753bf898da8
152 Risk Score

Malware Insights

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

The PDF contains a link disguised as a printer driver download, which redirects to a malicious URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this behavior. The document body and embedded links are consistent with a phishing lure, aiming to trick the user into clicking the malicious link.

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+deskjet+1110+printer+driver
    • https://cdn.shopify.com/s/files/1/0430/7563/3306/files/708802349.pdf
    • https://cdn.shopify.com/s/files/1/0434/9529/3094/files/causes_of_pneumonia.pdf
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/8330459622.pdf
    • https://cdn.shopify.com/s/files/1/0441/4462/3768/files/vigun.pdf
    • https://cdn.shopify.com/s/files/1/0461/7420/8163/files/problemas_de_algebra_resueltos.pdf
    • https://static.usrfiles.com/ugd/067ecb_117a309eb3284150b595bd56de92762d.pdf
    • https://static.usrfiles.com/ugd/b8c837_39a7e07516dd45019b2af0ae4b07613c.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_5464d71d045441d2adc856c6b6782afc.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e899798fbb648fa980cbd12b49332fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_43733c1196504b1db6c4a34a0a534cd8.pdf
    • https://static.usrfiles.com/ugd/b65acf_93442fb92d454af2b24593330d1fe7db.pdf
    • https://static.usrfiles.com/ugd/b8c837_71f729a6cd084929a663a34438542b81.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1b535e3ad7641ceab5dcd7fd233ed9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_589de52ea5fd4b389f9746c48308f888.pdf
    • https://static.usrfiles.com/ugd/b8c837_f36935d220e1433e9046aa06795b78b8.pdf
    • https://static.usrfiles.com/ugd/c7a620_9011c59c0b01443e8834112504b0d567.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e02755ea7f64cb2ba3cd4a7f15fa134.pdf
    • https://static.usrfiles.com/ugd/b8c837_64f0dd99f05a4b548b776fd9b4b409ed.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_off0000639f.bin
4348240161891e5ed1fc9148d48baa44f88fc1df75700bf9eaa185ee46a75825
pdf-font-stream PDF embedded font (sfnt) at offset 0x639F 5064 bytes
font_01_sfnt_off00007505.bin
7f58fe681ebbfb1af40b3fb45197099ff06513eb013f4b87214e839372cddf2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7505 11604 bytes