Malicious PDF — malware analysis report

Static analysis result for SHA-256 75546994e41b1d14…

MALICIOUS

PDF

40.6 KB Created: 2020-08-22 00:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb3abdfbb1df86089347104123f3897e SHA-1: 7fdc0530b1215e186263b963630694c4a20f1868 SHA-256: 75546994e41b1d1492ef5df9d7e625f88fb05e65e57c5fdcda355d2b19ceaecb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=outfit+falda+negra+larga+formal', which is also listed as a malicious redirector. This suggests the primary purpose is to lure users to a malicious site. No scripts were extracted, limiting further analysis of the execution chain.

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=outfit+falda+negra+larga+formal
    • http://xodopama.21tarabrooklyn.com/uploads/1/3/0/7/130738697/nuxepepowal.pdf
    • http://zutuwur.cathlinchiang.com/uploads/1/3/1/3/131381078/pogusakori_dokiwuzudukibom_lorelojo_mosuvisipizir.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/6296599958.pdf
    • https://cdn.shopify.com/s/files/1/0433/8342/3126/files/2779733367.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0432/files/22530323705.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/aristoteles_historia_animalium.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/pnrc_2018_date_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0439/1557/5464/files/lugulabomeduweke.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91960476686.pdf
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/bending_moment_basics.pdf
    • https://cdn.shopify.com/s/files/1/0435/3317/2885/files/xiralujefujulekimewetapug.pdf
    • https://cdn.shopify.com/s/files/1/0431/4585/5137/files/ftir_spectroscopy_principle_and_applications.pdf
    • https://cdn.shopify.com/s/files/1/0440/7413/9813/files/cash_flow_management_in_construction_project.pdf
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/41497329744.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/46605656568.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_off00006031.bin
8ba4da553d65989f7df5906fd52b741215d4b6dc83f9d76a8ba4b68001102b11
pdf-font-stream PDF embedded font (sfnt) at offset 0x6031 5076 bytes
font_01_sfnt_off0000715a.bin
10780ab009bdeaa5decea749d13762d8aa09bd23d947994044cc38cafc4bed6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x715A 10612 bytes