Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d745c43225ffca7…

MALICIOUS

PDF

38.4 KB Created: 2020-08-12 04:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed552c940f5e2c74b5672df1d3da583b SHA-1: 3aaeabb77dcae3fd1805a87916c22b7ce4c5b474 SHA-256: 6d745c43225ffca746a3ef9553f88fd05a95f1e5571a2a3e08f8ac5157bce106
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the string 'lg chiller pdf' and the malicious URL, suggesting a lure for a phishing or scam campaign. The PDF_SEO_LINK_FARM heuristic indicates a large number of links to other PDFs, likely for SEO manipulation or to host further malicious content.

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=lg+chiller+pdf
    • http://files.dlfinancial.org/uploads/1/3/1/3/131379749/tobij.pdf
    • http://melexipiz.bulverdepregnancy.net/uploads/1/3/0/7/130776394/3704817823de.pdf
    • http://files.tohsgirlsvolleyball.org/uploads/1/3/1/4/131452958/764ef54f876.pdf
    • http://files.cupcakesalacarte.co.uk/uploads/1/3/1/6/131606165/desokodom.pdf
    • http://zegimad.livelongherb.com/uploads/1/3/2/6/132681862/9430536.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7573/1607/files/pepegutemanipebowazupus.pdf
    • https://cdn.shopify.com/s/files/1/0436/5965/7374/files/49941835262.pdf
    • https://cdn.shopify.com/s/files/1/0428/3292/0732/files/mobisar.pdf
    • https://cdn.shopify.com/s/files/1/0436/1581/3795/files/22838245108.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/71619107247.pdf
    • https://cdn.shopify.com/s/files/1/0433/2004/9822/files/57477675820.pdf
    • https://cdn.shopify.com/s/files/1/0439/0099/3691/files/beethoven_piano_concerto_5_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/4517/4939/files/atalasoft_to_tiff.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7407/files/15593666481.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/13040351059.pdf
    • https://cdn.shopify.com/s/files/1/0429/4469/2383/files/losexuwudukav.pdf
    • https://cdn.shopify.com/s/files/1/0431/2809/4882/files/vifizekeponaxufe.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_off000059c4.bin
6bcfa014ced841f16d4d459db98464d6ec33eeaf13dbcff3860a9a0169095ccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59C4 4972 bytes
font_01_sfnt_off00006aa8.bin
c41e60626c9f4f8a8446bc4451a90e4c648fc419039b0d4537715fef978fd38f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA8 10056 bytes

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