Malicious PDF — malware analysis report

Static analysis result for SHA-256 83c57a2764ce3e12…

MALICIOUS

PDF

48.2 KB Created: 2020-08-09 08:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8efdff8b3445cc4859997436cc427af SHA-1: 309049f2077c0d8b978287e87248fe269ce34167 SHA-256: 83c57a2764ce3e12477758169eff1fdcb9c53f9cdc3bbeea50470aeefbccad01
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded URL 'https://ttraff.cc/pify?keyword=les+pieces+de+la+maison+en+francais+pdf' is a primary indicator of this malicious redirection. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains text related to the embedded URL's keyword, suggesting a lure.

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=les+pieces+de+la+maison+en+francais+pdf
    • http://files.greenhopetheatre.org/uploads/1/3/1/3/131380847/2379536.pdf
    • http://files.cresswellpaints.com/uploads/1/3/1/4/131438509/7143936.pdf
    • http://files.kittyangel.org/uploads/1/3/0/8/130873718/d00a21c.pdf
    • http://files.lithium-power.com.au/uploads/1/3/2/6/132696263/vogopodir.pdf
    • http://xelepisuz.stephaniewestliterature.com/uploads/1/3/0/7/130738524/subaresepow.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/26632417510.pdf
    • https://cdn.shopify.com/s/files/1/0436/0981/7251/files/18499211978.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/cher_lloyd_oath_lyric.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2679/files/95122178288.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4663/files/23081390193.pdf
    • https://cdn.shopify.com/s/files/1/0432/3141/2379/files/pepejurut.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/teora_de_la_evolucin_qumica_o_abiognesis_primaria.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/48089484673.pdf
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/78458855440.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3749/files/zozotatudosarunepufusimob.pdf
    • https://cdn.shopify.com/s/files/1/0435/3517/1736/files/donamafenujovoji.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_off0000636f.bin
1a5727f5bd0434dec208cb69621a9af888a630c4f05aef812d1133b42b5870fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x636F 5240 bytes
font_01_sfnt_off00007527.bin
a4c084d6df7122c489a01128b83240a16a5cb9dabd9aa697e6a5be0854efa11f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7527 2992 bytes
font_02_sfnt_off000080a2.bin
2be1a1b2b42fce9b7c09072efe5a5b24b24a1742c610f7700eebf9548b64cd9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80A2 16144 bytes

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