Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e5e701e1f042b2e…

MALICIOUS

PDF

39.8 KB Created: 2020-09-09 23:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5cdddf0b0ec7a140d9a205371fac736 SHA-1: 6ee646c5e675318d41eced6de80a9b15f2c7d39c SHA-256: 1e5e701e1f042b2e8e2e819c5706f7f832b19903e9883d4e8687e4deaff52ecb
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm. One of these links points to a known malicious redirector. The document body contains what appears to be junk data and a reference to the redirector URL, suggesting the primary purpose is to lure users into clicking malicious links. No scripts were extracted from this sample.

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.link/pify?keyword=pardesi+babu+dj+song
    • http://files.catherinegrace.co/uploads/1/3/0/7/130739519/kupoxudopukujikot.pdf
    • http://files.campfirequilts.com/uploads/1/3/2/8/132814276/fb44c161db710.pdf
    • http://rozofawef.bigbadbaragon.com/uploads/1/3/0/8/130874359/53bf18bd60e.pdf
    • http://rasoz.bigbonedfitness.com/uploads/1/3/0/8/130873947/08773.pdf
    • http://jupetowox.rebeccafalcasantos.com/uploads/1/3/0/8/130813834/5cdf5c425.pdf
    • http://files.dusantynek.org/uploads/1/3/2/8/132814977/9cc42ef4e456c8.pdf
    • http://nalunoja.drawinginchurch.com/uploads/1/3/1/3/131398575/5411134.pdf
    • http://files.ivazullo.com/uploads/1/3/2/6/132682076/jelepimijinuwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/gallbladder_polyp_guidelines_australia.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/delunulesif.pdf
    • https://cdn.shopify.com/s/files/1/0450/8804/7256/files/request_for_vacation_leave_template.pdf
    • https://cdn.shopify.com/s/files/1/0452/6505/9997/files/75205239079.pdf
    • https://cdn.shopify.com/s/files/1/0431/2809/4882/files/barosawobefarubaga.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/nuzukekesubasajugut.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/44539080531.pdf
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/dictionnaire_informatique_anglais_franais_telecharger.pdf
    • https://cdn.shopify.com/s/files/1/0433/1634/7035/files/85437713914.pdf
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/62538709715.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053f5.bin
fffc8e80d8506f9c4dbfb5cec5f6ec411d51237f18577898ffbe5bf0d6de22a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53F5 5176 bytes
font_01_sfnt_off0000659c.bin
8e66381b43159ac757c5f80a2a2af503d33d8173da4f168bbabb37d52efc09f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659C 13948 bytes

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