Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a3bd7162e220ad…

MALICIOUS

PDF

38.2 KB Created: 2020-08-11 07:10:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bb8fd5373915b1a3dd96e86cfbf4906 SHA-1: 6103526ea733617eb8da0729d6c4c3180a18ff1c SHA-256: 63a3bd7162e220adc89c5c764a85087a98ac8afc2462f4ad4839c04fe76a9406
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for distributing malicious content. The heuristic firings indicate the PDF is designed to link to a large number of external PDFs, likely for SEO manipulation or to host further malicious content. The embedded URL points to a redirector, suggesting an attempt to lead the user to a malicious 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.cc/pify?keyword=carol+of+the+bells+pdf+piano
    • http://files.sexualintegrity247.com/uploads/1/3/1/1/131164520/norupunenezejutifoma.pdf
    • http://files.bornphilippines.com/uploads/1/3/2/3/132303229/furidevitebesime.pdf
    • http://najelod.elitesandvolleyball.com/uploads/1/3/1/3/131382274/5254686.pdf
    • http://files.cdc-design.net/uploads/1/3/0/7/130739971/bisuxigubafo.pdf
    • http://files.radicoolair.com/uploads/1/3/1/3/131398334/zexovejow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/5701948375.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/rocking_horse_winner.pdf
    • https://cdn.shopify.com/s/files/1/0437/8873/0525/files/peasant_s_quest_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/mazus.pdf
    • https://cdn.shopify.com/s/files/1/0429/8748/7395/files/29672768575.pdf
    • https://cdn.shopify.com/s/files/1/0436/7102/7865/files/fatuzajizoji.pdf
    • https://cdn.shopify.com/s/files/1/0431/6194/4228/files/75594375748.pdf
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/jibaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/24979613101.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/92293341777.pdf
    • https://cdn.shopify.com/s/files/1/0429/1995/2550/files/28987547144.pdf
    • https://cdn.shopify.com/s/files/1/0430/3260/8921/files/54289338038.pdf
    • https://cdn.shopify.com/s/files/1/0430/2094/3523/files/30189418552.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004850.bin
c6acebe3750ab55c09714fa1b34f6c70ddae3ce202e1a088ffcbc34adab53285		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4850 6588 bytes
font_01_sfnt_off000058ca.bin
f39960897346de1400d01dc9ba9ea37b5e135e337973d6f93ed77c4058dd9874		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58CA 5176 bytes
font_02_sfnt_off00006a55.bin
10958b9ea71bc8094e1d68803547cd70a5ee80ca896494671b4983dc07babd93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A55 9672 bytes

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