Malicious PDF — malware analysis report

Static analysis result for SHA-256 844cd57a6f747425…

MALICIOUS

PDF

35.0 KB Created: 2020-08-06 08:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a60320108dac3aae14393a4a8d9f6492 SHA-1: 27f60275c3fe88c42d28f3899b3d84d0b7bac22b SHA-256: 844cd57a6f7474250f9b5b091154a360c387a9dc392b706d5750cd015272622d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a significant number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting a phishing or malicious content delivery attempt. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the sheer volume of links and the presence of a malicious redirector are strong indicators of an attack pattern aimed at either SEO manipulation or user redirection to harmful sites.

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=biblia+de+referencia+thompson+rvr1960+pdf
    • http://files.naturallyphoto.com/uploads/1/3/1/3/131382243/muril.pdf
    • http://wopigezok.biblebelieversoflouisville.net/uploads/1/3/2/7/132712093/7437381.pdf
    • http://files.lizromanek.com/uploads/1/3/0/8/130813782/1808551.pdf
    • http://moguguze.capitalpollinatornetwork.com/uploads/1/3/2/7/132740892/5784839.pdf
    • http://files.tbcsr.org/uploads/1/3/2/7/132740743/nejexerabumuso-zalij-viwuvowagikit-lojon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9889/7574/files/67398030295.pdf
    • https://cdn.shopify.com/s/files/1/0433/9607/1578/files/media_query_mobile_only.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4986/files/good_life_kanye_west.pdf
    • https://cdn.shopify.com/s/files/1/0429/5540/7511/files/94604011725.pdf
    • https://cdn.shopify.com/s/files/1/0429/4869/0076/files/94837248010.pdf
    • https://cdn.shopify.com/s/files/1/0435/0954/7174/files/zekawi.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/aitsl_standards.pdf
    • https://cdn.shopify.com/s/files/1/0432/0673/8079/files/42067915720.pdf
    • https://cdn.shopify.com/s/files/1/0436/5680/6553/files/55024145471.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/5982697245.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/kukapememuzeriba.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_off00004698.bin
ae3d241189ce483e2eb7fe627eca9ce9f9e5137d04d99a3e4d59568539232585		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4698 6148 bytes
font_01_sfnt_off00005b59.bin
6a48c19eeceb30a10c0ba303505d85f5a44b794e5f0f13c956b48c5a4a31e1a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B59 10096 bytes

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