Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f0459b2abc9107c…

MALICIOUS

PDF

46.0 KB Created: 2020-08-14 04:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d1b5ad1ce28c94c47745c5c1c28e693 SHA-1: b0fdac38162a754363d168d13bd7b89f21cbdd99 SHA-256: 7f0459b2abc9107c46bf5e8b86cf24c9c8815374f562458b137d19d0e2e6a321
162 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded link structures suggest a lure for downloading potentially unwanted software or malware, masquerading as a legitimate resource. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=adobe+photoshop+cs5+brushes
    • http://files.snazzycakesedibleart.com/uploads/1/3/2/6/132681482/6102841.pdf
    • http://files.parkguitars.com/uploads/1/3/0/8/130814124/kasedogogorog_betuwefi_bunepojuja_bozuf.pdf
    • http://files.weldcountymeatgoats.com/uploads/1/3/2/6/132681576/sirafakigexisav.pdf
    • http://files.theamateurmediablog.com/uploads/1/3/1/3/131381607/4992372.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/7698/3713/files/gozerotonawupu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4030/9402/files/98641118693.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/gosomevomodazubinarefajiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/alternative_asset_classes.pdf
    • https://cdn.shopify.com/s/files/1/0432/5883/9198/files/amigdalitis_bacteriana_adultos.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6151/files/marvel_characters_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/8778/1276/files/25823169623.pdf
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/xepatisujavogojizupa.pdf
    • https://cdn.shopify.com/s/files/1/0430/3798/2869/files/lezujidimot.pdf
    • https://cdn.shopify.com/s/files/1/0431/2629/2629/files/52614679319.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/bimewibarawalesamobiko.pdf
    • https://cdn.shopify.com/s/files/1/0434/2883/9586/files/16427640823.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006847.bin
b60a35994e6a2e0de5ad5cb7d62f435b7a673911ac625dcd9a6905871aa9ca93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6847 4900 bytes
font_01_sfnt_off00007908.bin
b5a8e7af5667f30072c688e6c001574ce28d47274ed195c44d89e072a781b70a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7908 10536 bytes
font_02_sfnt_off00009cdd.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CDD 4324 bytes

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