Malicious PDF — malware analysis report

Static analysis result for SHA-256 24a375a755662d88…

MALICIOUS

PDF

40.9 KB Created: 2020-08-20 20:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea5a34cda6358a472002d563dd62ffd9 SHA-1: 42dcfeb94f2a54ca68fd03a1dc21d9b974f49004 SHA-256: 24a375a755662d88332892f6cba1bcc5ab645e5472e0752f10d8cea6a34ce677
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm designed to redirect users to various PDF documents hosted on Shopify and other domains. The primary redirector URL, https://ttraff.ru/pify?keyword=honeywell+thermostat+manual+t4r, is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to download potentially malicious content disguised as a thermostat manual. No scripts were extracted, and the maliciousness appears to stem solely from the redirection infrastructure.

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.ru/pify?keyword=honeywell+thermostat+manual+t4r
    • http://files.frocksunderground.com/uploads/1/3/1/6/131606953/03c8e83f3a5.pdf
    • http://files.companionsofchrist.org/uploads/1/3/0/9/130969375/3234800.pdf
    • http://dozimum.strippeddown.net/uploads/1/3/1/4/131482995/7103614.pdf
    • http://zutoru.spokanehomeprep.com/uploads/1/3/0/7/130776485/8614953.pdf
    • http://files.ashleykdrew.com/uploads/1/3/1/3/131398515/vasuxedu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9623/6447/files/49076673051.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4742/files/namalurusosetabitigu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/net_gear_wpn824.pdf
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/pofabaderaratiwunam.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/dufilaroval.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52325197595.pdf
    • https://cdn.shopify.com/s/files/1/0434/4571/5109/files/21023036969.pdf
    • https://cdn.shopify.com/s/files/1/0431/2019/7789/files/vuparodulijupepozoxo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4139/7656/files/what_happened_to_the_ancient_library_of_alexandria.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/9006/files/19162884917.pdf
    • https://cdn.shopify.com/s/files/1/0432/5271/1581/files/ancient_board_games_in_perspective.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_off00006218.bin
0e43062c10d697c18fc53c55a70a581d7a98c2118d1dbb432fbb18c5df5248cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6218 5168 bytes
font_01_sfnt_off00007390.bin
bd0d116dfd6682e9033b5727733d86634c4ac850c9b0d3e254911c6758a4351d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7390 10376 bytes

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