Malicious PDF — malware analysis report

Static analysis result for SHA-256 337858eebbffe54c…

MALICIOUS

PDF

61.9 KB Created: 2020-07-30 02:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 085f2008140be7644685d80e8114b593 SHA-1: 37f79617943f788344a24c8f43c405a78d160616 SHA-256: 337858eebbffe54cfab26ca543656213e5be0f35b82085eaa403d7ac68aa7b8a
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, pointing to various domains including a known malicious redirector at 'ttraff.cc'. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create SEO-optimized content that can be weaponized.

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=defensa+siciliana+clasica+pdf
    • http://files.junkim666.com/uploads/1/3/0/7/130775612/farisasomukuvuv_murusopobimi_gidilori.pdf
    • http://files.baseballtrips.net/uploads/1/3/0/7/130740297/9227316.pdf
    • http://files.wooftapetshop.com/uploads/1/3/1/4/131454034/3540123.pdf
    • http://files.22ave.tv/uploads/1/3/1/6/131606118/8aafce23.pdf
    • http://files.thebeanfarmofscotchgrove.org/uploads/1/3/0/7/130740138/mexomaxaluwuxuno.pdf
    • http://files.the
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/dizotimebidelavizogada.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3871/files/rekunu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/pimadej.pdf
    • https://cdn.shopify.com/s/files/1/0438/8257/8088/files/wedomitalexa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/94812892210.pdf
    • https://cdn.shopify.com/s/files/1/0432/4694/4416/files/lotinagisefazigo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fulefevizurosojasi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/redadi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9694/7353/files/67651674564.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/13946632626.pdf
    • https://cdn.shopify.com/s/files/1/0437/1644/4315/files/novekotoginud.pdf
    • https://cdn.shopify.com/s/files/1/0432/7292/9435/files/32970131282.pdf
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/13695538215.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6280/files/99070163212.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_off0000b2af.bin
4d077368f2f2dd53ce1f5e88124e63a7245b900c99050706ba92b958cf73942d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2AF 4648 bytes
font_01_sfnt_off0000c28c.bin
49405060cd276edfc3540c3ebd3513cb01f6c24850741f3b29bb65bafa458197		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC28C 11620 bytes

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