Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b7225413c655617…

MALICIOUS

PDF

50.2 KB Created: 2020-08-05 11:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4544d37fb215690e5c470c81054b467 SHA-1: f0b0fa23ed48fd12b944875c2fe69e4f9354b323 SHA-256: 2b7225413c655617a855f38b7606fe4c281608299d6c53b8d3e3baf1e4a03a3b
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.ru/pify?keyword=present+perfect+tense+simple+past+tense+pdf as pointing to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many hosted on cdn.shopify.com, suggesting a link farm designed to obscure the true malicious destination. 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.ru/pify?keyword=present+perfect+tense+simple+past+tense+pdf
    • http://mezivojeg.nicholastoddshumate.com/uploads/1/3/0/7/130775934/debimebopobadamomop.pdf
    • http://files.chunkybrother.com/uploads/1/3/0/8/130813420/xepanosa-mojedopofis-boriwebelaru.pdf
    • http://files.mattandmaries.com/uploads/1/3/1/4/131453733/jekona.pdf
    • http://mafixaxo.sandyblaisdell.com/uploads/1/3/0/7/130738720/5a92c3.pdf
    • https://cdn.shopify.com/s/files/1/0429/3941/6732/files/92524092299.pdf
    • https://cdn.shopify.com/s/files/1/0433/0756/5209/files/5562042820.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3318/files/pdf_aristotle_nicomachean_ethics.pdf
    • https://cdn.shopify.com/s/files/1/0429/5553/8595/files/77720144406.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69262577592.pdf
    • https://cdn.shopify.com/s/files/1/0431/2596/4949/files/nizefifazadobeliketujot.pdf
    • https://cdn.shopify.com/s/files/1/0433/4413/4294/files/79065316025.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/kitizebilimagenaxabil.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/fe_review_manual_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/7588/7523/files/49782607555.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_off0000715f.bin
057dafc9d2a6447d2f812cdfb0f0572d9819b701abe5049c8cd1128c5a32e81c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x715F 5300 bytes
font_01_sfnt_off00008351.bin
63d5a152117fa73990ebf1aae2e2a55112ed4b1f25645c003e8cf0106323629d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8351 10220 bytes
font_02_sfnt_off0000a67f.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA67F 16204 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.