Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e3a0a016bf610b4…

MALICIOUS

PDF

41.2 KB Created: 2020-08-21 15:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 337b9b97399ebbd996f30cf80f2ffffa SHA-1: ee1e79ff9f5fad31ebfc05ee9e1a503eb97bebec SHA-256: 7e3a0a016bf610b4406b82af48a7c4f5f30be9bbefac1aa95243846dccee8380
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified as a link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL, https://ttraff.cc/pify?keyword=adara+wadan+sinhala+image, is likely intended to redirect the user to a malicious site. The ML classifier also strongly indicated maliciousness, supporting the assessment of a phishing or redirection attack.

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=adara+wadan+sinhala+image
    • http://files.mxmsupport.com/uploads/1/3/1/4/131483266/4684688.pdf
    • http://lukalito.de-benedetti.com/uploads/1/3/1/4/131406069/senufaro.pdf
    • http://files.julindassalon.com/uploads/1/3/1/3/131398374/bozerulugal_xururi.pdf
    • http://files.friendsofaptoslibrary.org/uploads/1/3/1/3/131383924/9a03211.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4718/1718/files/79755681424.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2857/files/11484666874.pdf
    • https://cdn.shopify.com/s/files/1/0431/7446/1594/files/55758810476.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/54598540366.pdf
    • https://cdn.shopify.com/s/files/1/0443/5696/0412/files/weribijenivolamomijine.pdf
    • https://cdn.shopify.com/s/files/1/0432/4111/1712/files/7731284680.pdf
    • https://cdn.shopify.com/s/files/1/0432/3203/4976/files/77864892564.pdf
    • https://cdn.shopify.com/s/files/1/0441/0084/5720/files/jofivutosuzalur.pdf
    • https://cdn.shopify.com/s/files/1/0439/6243/3694/files/ecological_relationships.pdf
    • https://cdn.shopify.com/s/files/1/0440/0496/6565/files/snoop_dogg_tha_doggfather_zip.pdf
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/2350044233.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mogapusezonoxifetomo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8738/9087/files/65028950176.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000647b.bin
e1586bc5913bf2f82fdf97ee00f551037b5a91721d0f3be4c019ddfbb666b106		 pdf-font-stream PDF embedded font (sfnt) at offset 0x647B 5320 bytes
font_01_sfnt_off0000766b.bin
448781f2402ac448e71773348db007db2bbb99778a277515e4cdc203be9f1d8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x766B 9720 bytes

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