Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6f363a948524bd…

MALICIOUS

PDF

49.6 KB Created: 2020-09-01 21:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d01aa583e403120d906716524ea8b644 SHA-1: bce0d82e5791a03dc24ab07968c349e192e7bce9 SHA-256: 6d6f363a948524bdc5eb6e5476bf7d8f15d28c1d218f5d936ab5533b6c6eb663
154 Risk Score

Malware Insights

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

This PDF file contains numerous links to external PDF files, a common tactic for SEO link farms. One of the primary links directs to a known malicious redirector, suggesting the document is designed to lead users to malicious content. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=byte+of+python+by+swaroop+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4692/0615/files/novisutoxotosalepozekar.pdf
    • https://cdn.shopify.com/s/files/1/0429/2630/9543/files/godove.pdf
    • https://cdn.shopify.com/s/files/1/0437/1238/1079/files/jetisegiruvi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/87863209326.pdf
    • https://cdn.shopify.com/s/files/1/0438/9106/4987/files/wegugasiwigodedagupabege.pdf
    • https://static.usrfiles.com/ugd/b7306e_e8f7b231f10f4d93b2eca04f8fa43e53.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_6099775a750247499e9007ddd8f01667.pdf
    • https://static.usrfiles.com/ugd/dad90e_659280f457e9465496790a3c6226ee2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_8614395f95f14a9492019aaa4f76754e.pdf
    • https://static.usrfiles.com/ugd/429b25_fee58eda6e4c4fd6884186b7f61e616b.pdf
    • https://static.usrfiles.com/ugd/6c8f37_7cffa2d1b6be4f68b42c6a2d66cd4c6c.pdf
    • https://static.usrfiles.com/ugd/0bcf16_a6079301a2eb4657844890794539a23b.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25618010541.pdf
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/kobogogibosidojuwifodo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nuvororixepexovi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0863/0681/files/82592378487.pdf
    • https://cdn.shopify.com/s/files/1/0431/5181/8903/files/kumezafi.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_off00008124.bin
577e4da0062d48a437fcad6678c31339db2203b8ac7709182f1b888d28b9c528
pdf-font-stream PDF embedded font (sfnt) at offset 0x8124 5480 bytes
font_01_sfnt_off000093d7.bin
3d91aa362140dbb1a4c3f48018fc8d3966b820162bc930cf82cdefb1772402bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x93D7 11508 bytes