Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59ea695a25228e7…

MALICIOUS

PDF

50.8 KB Created: 2020-08-17 10:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39d5123a7752c6cc2518913be7e858ff SHA-1: fc4799873814029627e06a439603c460b13cf9e0 SHA-256: b59ea695a25228e7f95710214581ceb92b713b9d65fa2bc0525f33ca45009d82
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=kieselmann+butterfly+valves+manual'. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the URL that triggered the malicious redirector heuristic.

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=kieselmann+butterfly+valves+manual
    • http://vuduz.thetravelingwriter.org/uploads/1/3/0/7/130738797/1dd150904d.pdf
    • http://kidaxijot.firesideballoonsforsale.com/uploads/1/3/1/3/131381612/verosuwo-sijakobomuwe.pdf
    • http://guferuwa.pigtalerestaurant.com/uploads/1/3/1/3/131383613/zavejirasodide_jegubafoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/8675/7536/files/fire_alarm_design_certificate.pdf
    • https://cdn.shopify.com/s/files/1/0440/8197/1365/files/88710611243.pdf
    • https://cdn.shopify.com/s/files/1/0430/7428/9813/files/angela_duckworth_books.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/supply_chain_manager_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0436/9835/6392/files/rimujosedugufod.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/xalexififipobarumabir.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/google_sheet_pivot_table_update.pdf
    • https://cdn.shopify.com/s/files/1/0434/5338/2822/files/www.towordconverter._net_en_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/3379747067.pdf
    • https://cdn.shopify.com/s/files/1/0430/7750/1095/files/96939535875.pdf
    • https://cdn.shopify.com/s/files/1/0438/3752/2085/files/kubakubitebel.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7103/files/tapokul.pdf
    • https://cdn.shopify.com/s/files/1/0437/5976/3617/files/oxford_phonetic_dictionary.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_off0000897e.bin
ce4dc1ddddb834c3cc485c1f4ab4d83cfa78b910e5f3693f543684d2f8643006		 pdf-font-stream PDF embedded font (sfnt) at offset 0x897E 5184 bytes
font_01_sfnt_off00009b18.bin
17ef14ffc515a1b0b41020dbb371c2bb207d2a31aa229c9352eed44d40e68011		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B18 10400 bytes

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