Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5a74c5ffb5385b…

MALICIOUS

PDF

51.0 KB Created: 2020-08-20 04:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da4688f7e07bbccee2186a22e508e086 SHA-1: 1321c1f73ac85fd37aec83ee93a6311311e612d1 SHA-256: 7e5a74c5ffb5385b43fbb017baa08cd542a26bb4e3e35824f47737876b87f233
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that points to a redirector service. This suggests the document's primary purpose is to redirect the user to malicious content, likely for phishing or malware delivery.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=diabetes+australia+management+guidelines
    • http://korenatat.perciakwedding.com/uploads/1/3/1/3/131383314/mabap_suwurul.pdf
    • http://files.reignbowco.com/uploads/1/3/1/6/131637562/xajotazaweb_liwitozu_wezetop_semikigikuwa.pdf
    • http://files.sportinghackney.co.uk/uploads/1/3/1/4/131454143/mibisiv.pdf
    • http://gifaretav.cozybeirut.com/uploads/1/3/0/7/130739561/feab2.pdf
    • https://cdn.shopify.com/s/files/1/0429/9027/2675/files/lejefiligeme.pdf
    • https://cdn.shopify.com/s/files/1/0449/9865/6158/files/rib_fracture_deformity.pdf
    • https://cdn.shopify.com/s/files/1/0434/3208/3612/files/27024876070.pdf
    • https://cdn.shopify.com/s/files/1/0428/1873/2191/files/the_enormous_crocodile_story_book.pdf
    • https://cdn.shopify.com/s/files/1/0440/2076/0741/files/42595158229.pdf
    • https://cdn.shopify.com/s/files/1/0440/2115/3957/files/atomic_absorption_spectroscopy_principle.pdf
    • https://cdn.shopify.com/s/files/1/0429/1916/6105/files/21082934365.pdf
    • https://cdn.shopify.com/s/files/1/0434/2985/5393/files/beginner_workout_routine_at_home.pdf
    • https://cdn.shopify.com/s/files/1/0430/9617/8845/files/install_localhost_certificate.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/3000/files/lovely_piano_sheet_music_easy.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/vapumuwibulutewuluvi.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_off000088fa.bin
6ad8d3a15cbd1b13e97ab6026b67a0f9ffc199372346f075c9b4291d0a6c6546
pdf-font-stream PDF embedded font (sfnt) at offset 0x88FA 5284 bytes
font_01_sfnt_off00009ace.bin
e490b6ee1abfbe13370ea255277ff489974c16ebd3bd477c22d9ae28e19c8cff
pdf-font-stream PDF embedded font (sfnt) at offset 0x9ACE 10616 bytes