Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fa1fdd99e5387e…

MALICIOUS

PDF

58.1 KB Created: 2020-07-08 20:52:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e328f2dc1d7ba3db93e41f4d93b6346 SHA-1: f1308dedb5a6580ebeceeb539bd7035c225b2465 SHA-256: 95fa1fdd99e5387e68db07ec788a9e6ecb27d34448a5627146a6003462d19fea
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, many of which point to a link farm designed to mimic search results for PDFs. One of the primary links redirects to a known malicious redirector infrastructure. The document body contains embedded URLs that are part of this link farm, suggesting the primary intent is to lure users into clicking malicious links.

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/wb?keyword=domain%20driven%20design%20distilled%20pdf%20github
    • http://files.innerheartpathways.com/uploads/1/3/2/6/132681002/46e9335.pdf
    • http://files.lindyjames-christenson.com/uploads/1/3/1/3/131379612/3953267.pdf
    • http://files.oneburgh.com/uploads/1/3/1/6/131606642/8329858.pdf
    • http://files.dorabramden.com/uploads/1/3/1/3/131382141/3729828.pdf
    • http://files.fittingroomligonier.com/uploads/1/3/0/8/130814672/sodumavasoso_sugenufefigu_tinivotosuna_sezomojodupebe.pdf
    • http://files.mindfulserenityonline.com/uploads/1/3/0/8/130874629/pezozulaleku.pdf
    • http://files.handymanportlandmaine.com/uploads/1/3/0/8/130873849/tesugan-binixefagik-rekipugosa.pdf
    • http://files.ashleyparsonsyoga.com/uploads/1/3/2/7/132740415/newixebomufobezofawe.pdf
    • http://files.redesignforwholefamilies.com/uploads/1/3/1/8/131857193/jowudakavesof-rusodisoton-zofokizubolas.pdf
    • http://files.quasilocum.com/uploads/1/3/1/3/131380733/dazepip-tefifipipewesex.pdf
    • https://sadobibelor.files.wordpress.com/2020/06/sukolorakibedijukujaw.pdf
    • https://bowetom.files.wordpress.com/2020/06/jupakajijokizinotipoxa.pdf
    • https://dowulito.files.wordpress.com/2020/06/volosixinuvapexu.pdf
    • https://fusikazisome.files.wordpress.com/2020/06/94537569810.pdf
    • https://xalimiganifa.files.wordpress.com/2020/06/59503938926.pdf
    • https://sebowokulu.files.wordpress.com/2020/06/73851260223.pdf
    • https://murodebedani.files.wordpress.com/2020/07/55383591722.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gekisemegudifusoledo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57355052908.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a3c2.bin
9a3bd271ebcac03e586e25f27b1c716554c190b5390610f8bb8302261f91e715		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3C2 5536 bytes
font_01_sfnt_off0000b666.bin
dde839b4928078d834bca002ddf76c988ba0cf143c84581b829adceb92195b21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB666 10872 bytes

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