Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09316ccde4b12b3…

MALICIOUS

PDF

44.1 KB Created: 2020-08-08 00:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e46e5faef120f97c5063001609178c9 SHA-1: 33744d3c8b347c3f758f2b7db6cb86381ea7d972 SHA-256: a09316ccde4b12b3564425c86483416783730ba9d6a82a798dea4a7d1d80c84a
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be the distribution of malicious links disguised within a PDF document, likely for SEO poisoning or to lure users to malicious sites.

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=buchungsbest%25C3%25A4tigung+vorlage+pdf
    • http://files.oscarthedumpertruck.com/uploads/1/3/2/6/132682040/bakopanap_zanulipizuvu_rikod.pdf
    • http://files.ellisandassoc.com/uploads/1/3/0/7/130775393/b5b7cae63c0.pdf
    • http://files.weslangston.com/uploads/1/3/2/6/132680813/sadobu-dupomojizepili-gepuzob.pdf
    • http://sisuxake.hmongumc.org/uploads/1/3/1/4/131437508/1956111.pdf
    • http://files.shainahardie.com/uploads/1/3/2/6/132680986/jivedamu_maxesat_tofanome.pdf
    • https://cdn.shopify.com/s/files/1/0429/7654/2873/files/audyt_energetyczny_domu_jednorodzinnego.pdf
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/86110540077.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/66431037269.pdf
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/55244406890.pdf
    • https://cdn.shopify.com/s/files/1/0433/4118/5189/files/sudufazexigibiboxuler.pdf
    • https://cdn.shopify.com/s/files/1/0434/1805/8901/files/bhagavad_gita_slokas_in_telugu_with_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/zonuvonabewed.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/58767955166.pdf
    • https://cdn.shopify.com/s/files/1/0433/3099/4326/files/fogajugub.pdf
    • https://cdn.shopify.com/s/files/1/0431/4474/1024/files/31322794000.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3817/files/tinkers_construct_fractured.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_off000069f5.bin
624f68ec620ea00ad0fd092f845d660c314d3ad9616e6252ff752177c111d3b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69F5 5900 bytes
font_01_sfnt_off00007d84.bin
473096ffe5842513e3312d114f24d67f204f41eed1ee05d2edaa1375d9caf50c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D84 10892 bytes

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