Malicious PDF — malware analysis report

Static analysis result for SHA-256 2889e89705fb4028…

MALICIOUS

PDF

45.8 KB Created: 2020-08-14 07:25:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ff10592ebca556cebe7630f2893e2a1 SHA-1: 3fdd9542826a4f4504e867ba89af2aee82ef8d9f SHA-256: 2889e89705fb4028e897ece57c9fcb4c14b7d745a524f2d49a2901ce4d4fd2e7
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also assigned a very high probability of maliciousness. The document body, though partially corrupted, contains the URL https://ttraff.com/pify?keyword=facebook+post+image+size+guidelines, which is identified as a malicious redirector. This suggests the PDF is designed to lure users into clicking the link, likely leading to a phishing or malware distribution site.

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=facebook+post+image+size+guidelines
    • http://fisenoten.faithbaptistkaufman.com/uploads/1/3/1/4/131453541/lafurewel_garenanodix.pdf
    • http://files.elidrissijudo.com/uploads/1/3/0/7/130775727/be37d29cdf73c3.pdf
    • http://molujexal.southernperfection.com/uploads/1/3/2/6/132681026/bedanutunugipitajak.pdf
    • https://cdn.shopify.com/s/files/1/0427/9851/4343/files/36764841611.pdf
    • https://cdn.shopify.com/s/files/1/0428/1440/6823/files/sanusimalanomasinakanifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1305/4359/files/1996_ford_bronco_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4434/files/chaconne_violin_bach.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/64056381590.pdf
    • https://cdn.shopify.com/s/files/1/0434/6170/5890/files/duvilifogirolu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0593/4757/files/max_hp_5e.pdf
    • https://cdn.shopify.com/s/files/1/0438/2546/3456/files/lunasifupodatexagapifi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/33070698493.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8216/files/productimages___ff_-_f3274e3608c2a2_full._jpg.pdf
    • https://cdn.shopify.com/s/files/1/0432/7328/9888/files/celestial_navigation_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/kujavanorujisolu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0486/2374/files/sirovofajudigeno.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_off000069ec.bin
0910c35fb15a2cce071fe674260f230dea01439627e611ce5c0624fe938acaed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69EC 5504 bytes
font_01_sfnt_off00007c8d.bin
1db701b2b3aeec4451dbe3e728dbca4e948e4f35046bf80d0d1587cf451fc989		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8D 2532 bytes
font_02_sfnt_off0000879d.bin
a2c970786d35548c512e3c1096a75bc74a816938e30c56eb1b86c784d8213f92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x879D 10080 bytes

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