Malicious PDF — malware analysis report

Static analysis result for SHA-256 35601a16be12db2d…

MALICIOUS

PDF

44.3 KB Created: 2020-07-13 22:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32c70fa8551425fe3cd38985825cff64 SHA-1: 91a42192d561eefc8610850903ad0287c1b6ac66 SHA-256: 35601a16be12db2dc72160722d734aedef5827f96ff7d5ba227b9742686fd0ae
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, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is ttraff.com, which is used in conjunction with a keyword-based redirection scheme. While many links point to benign Shopify domains, the presence of the redirector and the ML classifier's high confidence indicate a malicious intent to lure users to harmful 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/wb?keyword=like%20enjoy%20love%20hate%20+%20ing%20pdf
    • http://files.necropheliaclothing.com/uploads/1/3/2/6/132682819/sopifitepera-zasosonajo-xajaziz.pdf
    • http://files.learnpallcare.org/uploads/1/3/1/3/131383478/tibuvozazuv.pdf
    • http://files.lksandassociates.com/uploads/1/3/2/6/132681477/cea1c138a72c.pdf
    • http://files.itsbendybo.com/uploads/1/3/1/4/131453636/jezusigeva_lipukada_kodedafa.pdf
    • http://files.theromancollar.com/uploads/1/3/1/3/131398091/04a13fc01ea1.pdf
    • http://files.necropheliaclothing.com/uploads/1/3/2/6/132682819/sopifitepera-zasosonajo-xajaziz.pd
    • https://cdn.shopify.com/s/files/1/0428/1230/9670/files/litimokifisatu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/72169571489.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xugufu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7052/1495/files/petuzinujuxosiviwojikafo.pdf
    • https://titamajopemu.files.wordpress.com/2020/06/32915447562.pdf
    • https://bukelemew.files.wordpress.com/2020/06/xexesezipulofizekulokap.pdf
    • https://gabixuke.files.wordpress.com/2020/06/10989003785.pdf
    • https://jevodoniweku954148245.files.wordpress.com/2020/06/30680453667.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/ralemuzumememejoxujivep.pdf
    • https://cdn.shopify.com/s/files/1/0429/7857/4490/files/kisisobusuxarotamevup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tizerosotusalasebix.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/15670119037.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2405/files/tesiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/2641/5779/files/paxupinugoxagutadulepiton.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_off00006edd.bin
e44e69640584307ef54c95135d874a7592c3a9ba8532b4bb17c5e6d5e36d23bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDD 5060 bytes
font_01_sfnt_off00008029.bin
78c74df98c60282a1f93ef6ec1df07e91236b886e894a2f1c0d9e5a826ffb0da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8029 10108 bytes

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