Malicious PDF — malware analysis report

Static analysis result for SHA-256 be1510252fedbe68…

MALICIOUS

PDF

49.9 KB Created: 2020-08-11 16:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21e287f15b5acdc802a98047f3f9d0e6 SHA-1: 88460ed69d7b7457bf311d3a98f0e4c2892106a2 SHA-256: be1510252fedbe684020a9e8fbd54c47b76a23ffd969abe91526342053d30a4a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Calendario serie d girone i 2020 20 pdf' and the malicious URL, suggesting a lure. The PDF also exhibits a link farm behavior, with numerous external PDF links, many hosted on Shopify, indicating an attempt to broaden reach or mask malicious intent. The ML classifier strongly flagged this PDF as malicious.

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=calendario+serie+d+girone+i+2020+20+pdf
    • http://files.mrsthornburgla.com/uploads/1/3/1/1/131164358/dixalunonisuv_zugezutetivugi_wekipavek.pdf
    • http://files.distinctdistributors.ca/uploads/1/3/2/6/132681767/tidujejigo-papenawemaxab-fowadetozuveku.pdf
    • http://files.donaldhalemusic.com/uploads/1/3/1/4/131453036/vademexatufod-bidutolidobaj-puxepizaruwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/2391/6443/files/o_level_economics_topical_past_papers.pdf
    • https://cdn.shopify.com/s/files/1/0432/7669/7760/files/complete_estimation_and_costing_of_residential_building.pdf
    • https://cdn.shopify.com/s/files/1/0436/1430/6466/files/29028708128.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0987/files/10453165553.pdf
    • https://cdn.shopify.com/s/files/1/0437/1516/6357/files/atkins_paula_physical_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0434/4968/0032/files/72990115718.pdf
    • https://cdn.shopify.com/s/files/1/0438/9237/5704/files/89725232931.pdf
    • https://cdn.shopify.com/s/files/1/0435/7757/3539/files/24695137387.pdf
    • https://cdn.shopify.com/s/files/1/0434/3532/7653/files/73852716352.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/malinconia_ninfa_gentile_bellini.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/75493587892.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/40074859597.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7545/files/jaloj.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/
    • https://cdn.shopify.com/s/files/1/0433/2391/6443/files/o_lev

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084fc.bin
6206845b9a75dbe53dbcb4b5d680b44bd19d8bb3d13d1e10d5d4aa0ebc6cf739		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84FC 5388 bytes
font_01_sfnt_off0000975a.bin
ca4c1da8ce1a96639d7e183bec73badbcc59f0871376a151d005bf3cb791764b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x975A 10780 bytes

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