Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c8a5f522d066f36…

MALICIOUS

PDF

47.3 KB Created: 2020-08-05 06:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 349f3cb1070ecc7011268cbbdb6749c6 SHA-1: 983fee81e8a5b830d63ddf4b3fa233ec0bb28aae SHA-256: 4c8a5f522d066f362c60861ce0a3b5fd30778a0792a600575c4c42f704d622db
152 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body and embedded links reveal a large number of external URLs, many hosted on Shopify, suggesting a link farm designed to distribute traffic. One of the primary links, 'https://ttraff.cc/pify?keyword=nonlinear+acoustics+hamilton+blackstock+pdf', is a known malicious redirector.

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=nonlinear+acoustics+hamilton+blackstock+pdf
    • http://files.raleighmoravian.org/uploads/1/3/1/6/131637092/zavokebofakapez-labukoke-guvarasadojut.pdf
    • http://files.kemigroup.com/uploads/1/3/1/0/131070452/wodawojabevilan-mopabejubus-goporodejojel-wefogixaz.pdf
    • http://files.vanhowell.com/uploads/1/3/1/0/131070113/1484461.pdf
    • http://files.roberthillpsychologist.com/uploads/1/3/2/8/132814791/tasunenixa.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/pibararokelaxetidasututij.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/fokiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/ribujitukelotemasaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/charge_blade_guard_point.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69651331918.pdf
    • https://cdn.shopify.com/s/files/1/0435/5201/4495/files/basic_tactics_for_listening_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/4162/7029/files/ich_guidelines_for_analytical_method_development_and_validation.pdf
    • https://cdn.shopify.com/s/files/1/0430/1481/5901/files/53610472641.pdf
    • https://cdn.shopify.com/s/files/1/0431/6849/7823/files/72175975109.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/wibikederilexufezizatilar.pdf
    • https://cdn.shopify.com/s/files/1/0441/2165/3400/files/dmg_to_iso.pdf
    • https://cdn.shopify.com/s/files/1/0432/3577/0532/files/what_is_120_kg_in_pounds.pdf
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/2005_chevy_cobalt_repair_manual.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_off0000638e.bin
09ea7327305554cdf315f84f7bf0a08311462b66adc85945d74cefb95b3beab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x638E 5568 bytes
font_01_sfnt_off00007654.bin
798147374ca8dbe7f933843e8a14e1ce563419119b418a80f0fd349d7bee3838		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7654 10488 bytes
font_02_sfnt_off00009a75.bin
357ebfcf57d2794f8e6388ac132726caa065d12f5d07c6b7ee4681451a0ab637		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A75 16152 bytes

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