Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd23849336ba815…

MALICIOUS

PDF

42.5 KB Created: 2020-08-22 03:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9747e07898fca26096802a48b4db176b SHA-1: a50eb507aa5b42702a34f3fc95f004769aea84d3 SHA-256: 7dd23849336ba815fd501d87bc64e0c3d250c5416a54c2a3196305ac33b87683
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded URLs, many of which are part of a link farm designed to manipulate search engine results. One URL, 'https://ttraff.com/pify?keyword=alta+complejidad+formosa', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document's structure and embedded links suggest an attempt to lure users or manipulate search rankings, potentially leading to malicious 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/pify?keyword=alta+complejidad+formosa
    • http://fakodo.msiphotography.net/uploads/1/3/0/8/130813714/xodigadulewoson-gujuvudetip-popotogexanakut-vigapezek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0463/2500/6497/files/nezusifujibifixuzefire.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/38846961262.pdf
    • https://cdn.shopify.com/s/files/1/0437/0127/2729/files/zuvigegigasiluvo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/dovuji.pdf
    • https://cdn.shopify.com/s/files/1/0431/4382/3517/files/vimerijanidi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6061/6599/files/48729371452.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5908/files/77667709715.pdf
    • https://cdn.shopify.com/s/files/1/0434/0298/5622/files/75494544536.pdf
    • https://cdn.shopify.com/s/files/1/0434/2887/2359/files/89410856451.pdf
    • https://cdn.shopify.com/s/files/1/0433/9177/8965/files/anyone_can_whistle_script.pdf
    • https://cdn.shopify.com/s/files/1/0430/7245/4810/files/9500947211.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_off0000648b.bin
c5e763ef8aed43d0468921fc9c77c091aeb1713887f09e08fdea4b0fc9d71627
pdf-font-stream PDF embedded font (sfnt) at offset 0x648B 5368 bytes
font_01_sfnt_off000076b8.bin
80e391d28aaab7fc9e9a143617d799d1dd15434933b55c68876cfcf61def64b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x76B8 11532 bytes