Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd7f497e8d6ab71…

MALICIOUS

PDF

47.5 KB Created: 2020-08-13 23:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 121408c344b8a1843518826a93778431 SHA-1: 27744dccd6ceaf320add40bfff474c1bb55b34e0 SHA-256: 6dd7f497e8d6ab7176ba84cfb238d8fea6664dd1bd8cf589afc31f24a3c85d55
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to external resources. One of these links, https://ttraff.ru/pify?keyword=calculativeness+trust+and+economic+organization+pdf, is identified as a known malicious redirector. This suggests the document is designed to lure users into clicking malicious links, likely as part of a phishing or malware distribution scheme. 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=calculativeness+trust+and+economic+organization+pdf
    • http://files.lovecyprusdogrescue.co.uk/uploads/1/3/1/4/131408465/4544249.pdf
    • http://files.verarey.com/uploads/1/3/1/4/131406582/091a98a45e.pdf
    • http://files.mindfit-performance.com/uploads/1/3/0/7/130775145/8945779018afcf.pdf
    • http://suloxonem.glamlashes.shop/uploads/1/3/0/7/130738792/tedeweguduxifoko.pdf
    • http://files.maocorrea.com/uploads/1/3/0/9/130969744/wegaxo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5910/9279/files/98576762138.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ridojunewosinojep.pdf
    • https://cdn.shopify.com/s/files/1/0438/9086/8379/files/lanogifinajitesi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8469/files/sports_illustrated_calendars_2016.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/novel_cecilia_wang.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8734/files/sociocultural_context.pdf
    • https://cdn.shopify.com/s/files/1/0435/1708/3803/files/64245834641.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/27733647654.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/kugesip.pdf
    • https://cdn.shopify.com/s/files/1/0439/6577/6030/files/ditazud.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/97840211092.pdf
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/sipomapux.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_off00007bb8.bin
59110fa3ae707466ad5c0f4ecb44601c77df0e125d1b296356768e6f81526969		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB8 5488 bytes
font_01_sfnt_off00008e56.bin
0e64674da327dfff46dbf19e16b3d9b32a2544169c146a03c3cbfa1d8d516aa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E56 10084 bytes

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