Malicious PDF — malware analysis report

Static analysis result for SHA-256 8252290fb6e81380…

MALICIOUS

PDF

41.6 KB Created: 2020-08-09 15:35:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbfe0f3acd966eaa55a86299ec41eb43 SHA-1: 2f4bcfd48fa4f5e775e8aebf7969fdb36ada58bc SHA-256: 8252290fb6e81380fccd8827c8393cd221b37fa75671bf2c92cf65effce6d5d6
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and PDF_SEO_LINK_FARM indicates a large number of outbound links, likely for SEO manipulation or to obscure the malicious destination. The document body, though heavily obfuscated, contains the malicious URL and other links, suggesting a lure to a phishing or malware distribution site.

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=business+analysis+process+model+pdf
    • http://files.cleararcheryinc.com/uploads/1/3/2/7/132741385/329a7175bd2eb.pdf
    • http://files.closeencountersadventures.com/uploads/1/3/1/3/131380546/2357691.pdf
    • http://files.roryjanismiller.com/uploads/1/3/0/7/130775103/e2926bc.pdf
    • http://files.drosephoto.com/uploads/1/3/1/3/131382330/watuzem.pdf
    • http://files.albertcuypclinic.com/uploads/1/3/1/3/131383493/40ed542c19f.pdf
    • https://cdn.shopify.com/s/files/1/0454/8378/6392/files/ansys_3d.pdf
    • https://cdn.shopify.com/s/files/1/0433/4295/4651/files/bedoluxifuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kujefitil.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2952/files/59765412751.pdf
    • https://cdn.shopify.com/s/files/1/0428/4094/8892/files/64521099656.pdf
    • https://cdn.shopify.com/s/files/1/0432/7741/8651/files/zisoperozorene.pdf
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/vipezi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/voporum.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3383/files/vizio_tablet_wont_download_apps.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/vuwarolijoxedapesu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1379/9066/files/82014590285.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/figarawevig.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2520/files/neurofibromatosis_2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8011835234.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_off00006548.bin
08ae8ba7e4b9b5d8a0787aca96e7f3ef36b6744c96493230eb7254783a79d84d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6548 5452 bytes
font_01_sfnt_off000077cb.bin
d4a40e1fc78ec722243f373ab89f6786709abd5f1cb9c304ff12b1335fbe4182		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77CB 9792 bytes

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