Malicious PDF — malware analysis report

Static analysis result for SHA-256 a506292dc0341a33…

MALICIOUS

PDF

45.0 KB Created: 2020-08-04 18:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5067edbf6ebec64e719dbd3856d80c5 SHA-1: a38f9faac1f315f2a08666a4df206d6ea5df2722 SHA-256: a506292dc0341a3372fe8bf32e24c0ca434399f6b430b11c6650353277bd8c25
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file contains a mass of external links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The document body text, though garbled, includes the same search query as the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=b+arch+drawing+questions+with+solutions+pdf
    • http://files.beyondthefinish.org/uploads/1/3/0/7/130739239/23c2af38a5d98b3.pdf
    • http://files.moombaparkps.vic.edu.au/uploads/1/3/0/7/130775373/c5743df461ee.pdf
    • http://files.soulop.com/uploads/1/3/0/7/130738806/guzujaburabifu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/vesuviwedawanonelomalefe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/10809735118.pdf
    • https://cdn.shopify.com/s/files/1/0436/1139/0115/files/dowipexozaxoripadep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/76913920344.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/26744866161.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/58634421083.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/canon_pixma_pro_100_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/3828/3678/files/sokanemufo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3006/7865/files/60150031583.pdf
    • https://cdn.shopify.com/s/files/1/0434/2985/5393/files/citizen_eco_drive_watch_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5578033559.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_off00006fb0.bin
152d51be43e396e21aedc54ee9d4ba10a0dd8e4cedca2daf8b8648dcdb7c929b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB0 5684 bytes
font_01_sfnt_off0000830c.bin
213e906151e07364b3a9719350a604415fb40e71632ea009348bd45666ab9b47
pdf-font-stream PDF embedded font (sfnt) at offset 0x830C 10648 bytes