Malicious PDF — malware analysis report

Static analysis result for SHA-256 61a25f4c9932507c…

MALICIOUS

PDF

40.8 KB Created: 2020-09-08 08:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 110d3ca75a1efe996a2665947af30f09 SHA-1: e5f3c800d5922caab2ce7a4ec2daa20945d28ef2 SHA-256: 61a25f4c9932507cc937b0b5b5450ce23fb6eb5c350f650ba63067fdcbcb7db9
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, 'https://ttraff.link/pify?keyword=securities+finance+transactions+reporting%2528+sftr%2529', is identified as a malicious redirector. The presence of a link farm and a malicious redirector suggests an attempt to lure users to malicious sites or to manipulate SEO for malicious purposes. No scripts were extracted, but the PDF structure itself is indicative of a malicious link distribution scheme.

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=securities+finance+transactions+reporting%2528+sftr%2529
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0307/4984/files/88544706538.pdf
    • https://cdn.shopify.com/s/files/1/0429/6369/7817/files/93493037209.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1585/files/the_fat_rat_jackpot_mp3_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6655/files/dieta_astringente_menu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9586/6010/files/83557711994.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/12408113685.pdf
    • https://cdn.shopify.com/s/files/1/0431/9703/8756/files/sufemewutorazaxenagaxu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9947/0486/files/who_is_the_addressee_in_a_letter.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/gizedivopiwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0054/4931/files/7859238614.pdf
    • https://static.usrfiles.com/ugd/f96b02_fc51bee38f6f43a89e17ee294682ba8e.pdf
    • https://static.usrfiles.com/ugd/ce5d00_5bca796dae1d442d926525316f758168.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd4141fcf85948148f7b269342f39ab0.pdf
    • https://static.usrfiles.com/ugd/21e6f2_bc097fc2345147b9bac80d49b3f9c442.pdf
    • https://static.usrfiles.com/ugd/19ce5d_8a657271cf604eb894829aa4126a4773.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_off000061ad.bin
448e6b104dcdfd4c33dff5f1f7a3c4139259bd100c9aa29a0d1e70a31e8dcda9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61AD 5408 bytes
font_01_sfnt_off00007434.bin
f14b076d58aa86b387656e1a2aaec1cef4108a328a33fd0cc26336314467b1ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7434 10032 bytes

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