Malicious PDF — malware analysis report

Static analysis result for SHA-256 0337cfe565b175c9…

MALICIOUS

PDF

40.9 KB Created: 2020-08-04 21:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e414b08130f21626a2440ba56146c19 SHA-1: f17d79f60b270d36ab6d91e200a9cc00a7281fcd SHA-256: 0337cfe565b175c9bd57869fe72c08b04752d3c9fb15ccf6b7a857a64289765f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, indicating a potential phishing or malware distribution attempt. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggest an attempt to lead the user to a harmful destination.

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=fusionner+2+jpg+en+pdf+mac
    • http://files.makingiteasycambodia.com/uploads/1/3/2/3/132303238/lozuroduzon.pdf
    • http://files.platformfriesdressuurpaard.nl/uploads/1/3/1/3/131380728/bofimusajolif_xifolatovilaxab_jexoxigovogogi.pdf
    • http://files.andrewphillipschmidt.com/uploads/1/3/1/3/131384568/sezokaxuxizuxav-dasexupagabejuv.pdf
    • http://files.zisscustomglass.com/uploads/1/3/1/4/131408142/didalawika-sisemeredisa.pdf
    • http://lakijos.christopheroakley.com/uploads/1/3/2/6/132695663/wosesoxunif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0754/8326/files/pocket_morty_recipe.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5809/files/kegaduveje.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5910/files/nikadibalagike.pdf
    • https://cdn.shopify.com/s/files/1/0429/4112/0679/files/tuxetuzi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sexewagufik.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/mamufudadewizitivajo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8683/0998/files/letuwolibejo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3234/4736/files/bexifedajatalu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5451/files/buwelepevab.pdf
    • https://cdn.shopify.com/s/files/1/0432/6549/1106/files/9058990646.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/24821869351.pdf
    • https://cdn.shopify.com/s/files/1/0440/7053/5318/files/bmw_warning_symbol.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_off00005d45.bin
71ba3688fe4c666d56afeee31426ca0de63306cc0c500f0656dc58a32a9c51d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D45 5604 bytes
font_01_sfnt_off00007050.bin
6d0032e920ffc78566fd045883a97fbdb3b1e20aa10b9401ffe3ac20476f1b00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7050 11964 bytes

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