Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ebcd160c5d082a6…

MALICIOUS

PDF

55.5 KB Created: 2020-08-14 09:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0652d70cfc0ac1431211314c419aee6 SHA-1: 16cd55389852dbde930d14dacd7c9b1d1fa13d5d SHA-256: 1ebcd160c5d082a63546aa567b4687c980eae35861fd144ee10e7f8f5ddfe2e2
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic indicating it links to known malicious redirector infrastructure. It also contains a large number of external PDF links, characteristic of a link farm. The embedded URL points to a redirector service, likely intended to obscure the final malicious destination. The document body contains text related to 'mcelreath statistical rethinking pdf' and the wkhtmltopdf application, suggesting a lure to download a seemingly legitimate document.

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=mcelreath+statistical+rethinking+pdf
    • http://files.roberthsachs.com/uploads/1/3/1/4/131453665/fisozidewizetowe.pdf
    • http://files.teamgome.com/uploads/1/3/2/8/132815343/rilukasezig-wezafudosibumag-babuxi-nuniwa.pdf
    • http://files.txlpcsupervision.com/uploads/1/3/1/3/131382590/figojawaponuf.pdf
    • http://xiraw.letmeshop4you.com/uploads/1/3/0/7/130739564/mowatasulemebi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0226/files/giwoxekapajatizuxen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/42696897997.pdf
    • https://cdn.shopify.com/s/files/1/0435/5181/7883/files/aromanian_language.pdf
    • https://cdn.shopify.com/s/files/1/0429/7919/7081/files/94087249311.pdf
    • https://cdn.shopify.com/s/files/1/0433/9938/1157/files/zezepu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2890/6138/files/81890554859.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/56648957042.pdf
    • https://cdn.shopify.com/s/files/1/0434/4823/8241/files/nozodojulafelitukiwejato.pdf
    • https://cdn.shopify.com/s/files/1/0440/8338/0376/files/36674849353.pdf
    • https://cdn.shopify.com/s/files/1/0438/5207/1074/files/adjective_preposition_combinations_list.pdf
    • https://cdn.shopify.com/s/files/1/0436/7548/4313/files/zojozukovopexalukow.pdf
    • https://cdn.shopify.com/s/files/1/0427/8163/8812/files/oliver_tractor_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/2480/0154/files/dajinu.pdf
    • https://cdn.shopify.com/s/files/1/0439/8101/3150/files/18482687813.pdf
    • https://cdn.shopify.com/s/files/1/0437/6743/1329/files/kumaxubirurokulebamogerib.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/
    • https://cdn.shopify.com/s/files/1/0433/0032/3478

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009175.bin
9003ceedbaca3d7428eade390262cd39c4eed2c9a78fc276cb15d7cac95e9642		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9175 5484 bytes
font_01_sfnt_off0000a414.bin
2cfdb016d27bcc0d17ff30caa17bcd3a985c1b1d170458e64a8e3187ad313af6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA414 14016 bytes

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