Malicious PDF — malware analysis report

Static analysis result for SHA-256 26c5a0c395e1f5da…

MALICIOUS

PDF

48.8 KB Created: 2020-08-19 14:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee7dcf0fd6142d667380a63aa3cd6b3f SHA-1: 918a72439e1ac75d9a9574766a102ed98c109e90 SHA-256: 26c5a0c395e1f5daa5c3bd12805bead43444a1232ccc84a748716e4e1adebfa5
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=corbettmaths+similar+shapes+area+and+volume+answers'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on suspicious domains, further supports this. No scripts were extracted from this sample.

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=corbettmaths+similar+shapes+area+and+volume+answers
    • http://files.gassingamerica.com/uploads/1/3/1/4/131452958/vopixezixasuv-vexole-zamepu.pdf
    • http://files.greenrockswarmbloods.com/uploads/1/3/1/4/131413718/6027200.pdf
    • http://files.wsparkscontracting.com/uploads/1/3/0/9/130969497/49fe5c66e834.pdf
    • http://files.hiloediblecrops.com/uploads/1/3/0/9/130969452/bb1aeeed542c.pdf
    • http://files.radiantawakening.net/uploads/1/3/1/3/131381681/fejuvimirumavemig.pdf
    • https://cdn.shopify.com/s/files/1/0434/1497/8718/files/79360916952.pdf
    • https://cdn.shopify.com/s/files/1/0436/3105/0915/files/download_walking_dead_season_6.pdf
    • https://cdn.shopify.com/s/files/1/0431/4818/1666/files/kozojiluwufub.pdf
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/arizona_diamondbacks_pitchers_and_catchers_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4252/files/45700101042.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/bhushan_power_and_steel_annual_report_2018.pdf
    • https://cdn.shopify.com/s/files/1/0433/7719/7221/files/3754809080.pdf
    • https://cdn.shopify.com/s/files/1/0431/0283/0745/files/puzibiwixezudopur.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/polabosixoni.pdf
    • https://cdn.shopify.com/s/files/1/0447/8743/3623/files/capitulo_3b_realidades_2_answers_conversaciones.pdf
    • https://cdn.shopify.com/s/files/1/0430/8110/5575/files/dfinition_de_la_comptabilit_analytique.pdf
    • https://cdn.shopify.com/s/files/1/0429/0327/3628/files/kikigele.pdf
    • https://cdn.shopify.com/s/files/1/0436/2846/2233/files/79952486483.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_off00007b17.bin
18447542a4c493787738614819af0afe7d31f944678766fd1df9d5de6b3435be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B17 5396 bytes
font_01_sfnt_off00008d4e.bin
1d7a60da1a545fb7db889456f6374ec4db2f88f10a8238dfcf302524cc6b34d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4E 12648 bytes

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