Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1027c4d2ba01d07…

MALICIOUS

PDF

39.5 KB Created: 2020-07-29 22:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 329b22a5eb6e72b8242fcf65acdf16b0 SHA-1: 55849183098ec36d9d060b4a900d93fd6e0feecd SHA-256: d1027c4d2ba01d078fb5aec623b1f18c32e5ec883d62bdc382b5d7af9b0a538c
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, with the primary purpose of redirecting users to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the initial redirector URL. 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.cc/pify?keyword=oxford+word+skills+intermediate+pdf
    • http://files.themilkshed-devon.com/uploads/1/3/1/4/131437061/rolopotes.pdf
    • http://files.owostyles.com/uploads/1/3/0/7/130776326/1927490.pdf
    • http://files.wonderspokaneleasing.com/uploads/1/3/1/0/131070845/lesadumovifarigifapa.pdf
    • http://files.livewiremusicnow.com/uploads/1/3/1/3/131380612/lowonubepeturuje.pdf
    • http://files.benevit.org/uploads/1/3/0/7/130739835/vexoveforipafoj_xakojotexuf_feresilomur.pdf
    • https://cdn.shopify.com/s/files/1/0428/6093/7382/files/89429512298.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8330/files/venawepikukalojawezubura.pdf
    • https://cdn.shopify.com/s/files/1/0437/2283/4071/files/zulijevejikaxesesopesox.pdf
    • https://cdn.shopify.com/s/files/1/0436/7548/4313/files/68888571910.pdf
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/84848100948.pdf
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/53021360423.pdf
    • https://cdn.shopify.com/s/files/1/0433/7896/6686/files/lonisepenosavepiwitufik.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/99376152244.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/muvadidolupenenewiseded.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8129/files/51590289910.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4123/files/63086246663.pdf
    • https://cdn.shopify.com/s/files/1/0434/9313/0390/files/80890392257.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mobisibat.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/ganaruvodonidolopumolonep.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_off00005950.bin
71c6b03b393b162e2803c22ea0996351ac3a310201f7d7729366c9c2306a04d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5950 5224 bytes
font_01_sfnt_off00006b14.bin
71a568b42beee4816658a00c8a56905105a64557e376955e87cc2a71d6134bf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B14 10520 bytes

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