Malicious PDF — malware analysis report

Static analysis result for SHA-256 21ef92978e9a48b3…

MALICIOUS

PDF

37.5 KB Created: 2020-08-18 21:16:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d131f4d9ca3c6c46ac8bd937db605770 SHA-1: ee3f8384a377ce94034817c8da9ee236c8a7d44f SHA-256: 21ef92978e9a48b34fbfd3abea26740e2bea97737e873e4e24585c60c6d2dd5f
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that leads to a URL designed to trick users into thinking they are backing up Facebook messages. The document also features a mass external PDF link farm, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The presence of a visual download button further supports a deceptive user interaction pattern.

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=message+backup+for+facebook
    • http://files.artbyalisonnewth.com/uploads/1/3/1/6/131636678/a8070c1379591.pdf
    • http://files.pavarinipr.com/uploads/1/3/1/8/131871390/pasenozuworasajed.pdf
    • http://files.friendsfabricart.com/uploads/1/3/0/8/130874614/sikuxav.pdf
    • http://waripiki.curiotheatre.org/uploads/1/3/0/9/130969360/f9131d.pdf
    • http://files.laurenboehmlynch.com/uploads/1/3/0/7/130739379/54d45a9bbd402.pdf
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/7003027999.pdf
    • https://cdn.shopify.com/s/files/1/0430/8136/7712/files/noneseberi.pdf
    • https://cdn.shopify.com/s/files/1/0439/0731/7912/files/negative_prefixes_to_form_antonyms_list.pdf
    • https://cdn.shopify.com/s/files/1/0437/8761/6413/files/bangsamoro_basic_law_latest_draft.pdf
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/napalabubodepit.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/wing_chun_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/silakezuxit.pdf
    • https://cdn.shopify.com/s/files/1/0439/0024/0024/files/guidelines_on_internalised_settlement_reporting.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/jevewit.pdf
    • https://cdn.shopify.com/s/files/1/0431/1610/1781/files/70055180779.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_off00005475.bin
d01952083532435ac034031d4045db38ebcb9eea01260818419cc3a61a3b3517
pdf-font-stream PDF embedded font (sfnt) at offset 0x5475 5360 bytes
font_01_sfnt_off000066d0.bin
61ea2aeecc32e13e9c8bff4cefc5d1f4a412650aad6f77e9b33a93a7179272c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x66D0 10128 bytes