Malicious PDF — malware analysis report

Static analysis result for SHA-256 69756edd20607a2c…

MALICIOUS

PDF

45.1 KB Created: 2020-08-02 21:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61d27b63cca30297789ccffa6a1ed935 SHA-1: f1c09d53bb43b6528592a6b12b5cbba895ceafd7 SHA-256: 69756edd20607a2c02fd4489f06634e6fa195b0a4160f5f38066194be9896d9f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, 'https://ttraff.cc/pify?keyword=early+transcendentals+2nd+edition+pdf', which likely serves as the initial lure. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect 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.cc/pify?keyword=early+transcendentals+2nd+edition+pdf
    • http://files.wolfridgearchery.org/uploads/1/3/2/7/132740204/5e77a6a.pdf
    • http://files.streetambitionunited.com/uploads/1/3/1/3/131381991/5ef02e87679f77a.pdf
    • http://files.arielcao.com/uploads/1/3/1/0/131070866/boloperaxuraxawov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0649/1797/files/foxusevewe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/biological_psychology_james_kalat.pdf
    • https://cdn.shopify.com/s/files/1/0431/6620/4066/files/13924833997.pdf
    • https://cdn.shopify.com/s/files/1/0438/4001/2450/files/17249263423.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9479/files/digujupemexerib.pdf
    • https://cdn.shopify.com/s/files/1/0434/3860/4450/files/darivusufedavigifuwamipak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9429/5203/files/bastard_of_loran.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/66468609464.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28821374719.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/mivizolunovuzabawolidim.pdf
    • https://cdn.shopify.com/s/files/1/0435/5604/4951/files/79435546848.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/vezijadam.pdf
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/sujovivilajikesine.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_off00007193.bin
db447fbcef03a7cae5e73365c3d51df83d1f5ab1e4405acf82b5a54bddba04de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7193 5340 bytes
font_01_sfnt_off000083da.bin
227f9f31dc6ff147c180ab5d44da8f4d8fb1f50331a60fbdd84de6bce62fb0c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83DA 10704 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.