Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb603a8eff12c17…

MALICIOUS

PDF

45.9 KB Created: 2020-08-24 04:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6576fe79fc8f8402ab2239d893e93a0a SHA-1: 53c5634c6bd08f7fcb78eb7f0accd4afb7f74143 SHA-256: 0cb603a8eff12c17098f750b0319622b02768db2407b1c17c5b053bd82453392
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 link farms and redirectors, indicating a phishing or scam attempt. The primary malicious URL identified is https://ttraff.com/pify?keyword=printable+impulse+control+worksheets, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'printable impulse control worksheets' and the malicious URL, suggesting a lure to trick users into clicking the links.

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=printable+impulse+control+worksheets
    • http://files.hypnobabiescoloradosprings.com/uploads/1/3/1/4/131437225/genezadulapi_zowoxafi_sudev.pdf
    • http://files.markgordonglass.com/uploads/1/3/2/6/132682852/6905680.pdf
    • http://files.kkmediation.com/uploads/1/3/1/3/131379894/4c2c255974.pdf
    • http://files.trendclothinginc.com/uploads/1/3/1/4/131437523/xarusi.pdf
    • http://files.firefighterrescuesurvey.com/uploads/1/3/0/8/130814644/acb387e833b8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6265/6157/files/lufomikezodavi.pdf
    • https://cdn.shopify.com/s/files/1/0439/4231/4152/files/2169752794.pdf
    • https://cdn.shopify.com/s/files/1/0438/3604/7525/files/73651608908.pdf
    • https://cdn.shopify.com/s/files/1/0433/9102/5303/files/fefuga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17844710077.pdf
    • https://cdn.shopify.com/s/files/1/0430/4044/0471/files/44823590915.pdf
    • https://cdn.shopify.com/s/files/1/0430/2520/3354/files/waguxubojopofivinadovoto.pdf
    • https://cdn.shopify.com/s/files/1/0433/8922/3066/files/lezavuvefefemuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/7234/8579/files/69496893349.pdf
    • https://cdn.shopify.com/s/files/1/0445/6228/4703/files/bending_stress_problems_and_solutions.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_off00006ef7.bin
c98e7fa9cc031769abe4c57e9bbcca50ce7ac456620a6b7dab7868a7e19103e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF7 5468 bytes
font_01_sfnt_off00008169.bin
30b10b8e895591a68a317c6956285fc696f8a3e3d5460b90d3b9a41fa8ab6570		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8169 12096 bytes

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