Malicious PDF — malware analysis report

Static analysis result for SHA-256 1119a3b83ab7a0fc…

MALICIOUS

PDF

43.0 KB Created: 2020-08-12 08:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36176399b2a56db2fa506a42513de37e SHA-1: 1f814aa876024ff460d1553650bf342235988c14 SHA-256: 1119a3b83ab7a0fc246a21adcf87d6117e6df5df4125bcd95f31e2ae487a7b45
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. This redirector is likely used to obscure the final destination and potentially deliver a malicious payload. The document body, though malformed, contains text related to a PDF download, reinforcing the 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.com/pify?keyword=dental+caries+the+disease+and+its+clinical+management+pdf+download
    • http://files.houstonbottledwater.com/uploads/1/3/2/8/132814220/65638e03ac94.pdf
    • http://files.anroflowers.co.za/uploads/1/3/2/7/132712447/nitaboxoso-rexakiwe-xurukotuxubakux.pdf
    • http://files.livinggodsmission.com/uploads/1/3/0/7/130775387/5801299.pdf
    • http://kudujom.natashahanova.com/uploads/1/3/1/0/131070306/3584123.pdf
    • http://files.stormh20bmp.com/uploads/1/3/0/9/130969889/6ce0367.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/6929/3223/files/76402742493.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/gomunumurubatulaxubotit.pdf
    • https://cdn.shopify.com/s/files/1/0431/4333/2000/files/81562635173.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3026/files/36290500525.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wifufokamavobopizevotug.pdf
    • https://cdn.shopify.com/s/files/1/0440/9327/6312/files/bimal_mitra_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5525/1605/files/15953784715.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3587/files/davuxeketurefo.pdf
    • https://cdn.shopify.com/s/files/1/0455/3559/2613/files/amyloidosis_pathogenesis.pdf
    • https://cdn.shopify.com/s/files/1/0428/3724/6118/files/74615556877.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/types_of_grease_for_bearings.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059ee.bin
f41c5a5f0a01c7331fe42ef00f814178f9d94d09dc5c7698ab343dbe9eb2213a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59EE 5448 bytes
font_01_sfnt_off00006c56.bin
6c79bfa48ed1bc1a114330ea295aa38eb71cd66d291b808a4849f49fe62632d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C56 10564 bytes
font_02_sfnt_off00009062.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9062 4324 bytes

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