Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d931bd4093e1c3…

MALICIOUS

PDF

56.0 KB Created: 2020-07-29 16:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 360d658bbc98374d20208334bc529d60 SHA-1: 27c7ea8adf63bca739f1a06f41176aee5e0ee818 SHA-256: d0d931bd4093e1c3a1ea42297420c9b82334d51cf78406b5020a721ff738e53a
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary redirector URL pointing to known malicious infrastructure. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its specific lure, but the link farm and redirector strongly suggest a phishing or malware distribution attempt.

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.cc/pify?keyword=agnes+gray+pdf
    • http://files.kintzmejiaballet.org/uploads/1/3/0/7/130776393/4950217.pdf
    • http://files.cavershamholistics.co.uk/uploads/1/3/2/6/132681951/8863419.pdf
    • http://files.samanthastewartofficial.com/uploads/1/3/2/6/132682295/wojiroxudid.pdf
    • http://files.bna-stlouis.org/uploads/1/3/0/7/130740073/2445266.pdf
    • http://files.cav
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/nudunijefaxuriradumigufug.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/55805695455.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3541/files/96844995565.pdf
    • https://cdn.shopify.com/s/files/1/0434/9168/8610/files/zajaziro.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6819160869.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/gigomevabuzevemobol.pdf
    • https://cdn.shopify.com/s/files/1/0438/8339/7272/files/80314260177.pdf
    • https://cdn.shopify.com/s/files/1/0438/9827/3944/files/17729541969.pdf
    • https://cdn.shopify.com/s/files/1/0435/1324/9946/files/xavisupomivodomuzelixom.pdf
    • https://cdn.shopify.com/s/files/1/0437/4193/7818/files/53537081162.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/60995664881.pdf
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/42688595998.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_off00009488.bin
fc36e34ad0ab527553c6173be9ac26fb0b3002eaab86e524a41f26a496c8dfaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9488 3212 bytes
font_01_sfnt_off00009ffc.bin
7305ac2d03c0eb47c3248c2638a8a772c236067668d948cd8d9dce395153ca2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FFC 4816 bytes
font_02_sfnt_off0000b05f.bin
ec1ba019351bca634761908d721d2b8fd93ac63ecf3ee67bbe15ef9cf9b92a51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB05F 9980 bytes

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