Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc6bf528e1707c7…

MALICIOUS

PDF

55.9 KB Created: 2020-08-28 04:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74310679553a1d91f740fb07302e93e2 SHA-1: eee81b7f598906a53f62cca66e447bda452a8c23 SHA-256: abc6bf528e1707c7a60084385e87c727fa44f84cf7bb5e0631ffca2f33c44891
160 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used in SEO link farms to manipulate search engine rankings or distribute malicious content. One of the embedded links, 'https://ttraff.cc/pify?keyword=freenas+build+guide', is flagged as leading to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Freenas build guide', suggesting a lure to entice users to click the malicious link. The presence of numerous links, including benign ones hosted on Shopify, alongside the malicious redirector, indicates a sophisticated attempt to mask malicious activity.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=freenas+build+guide
    • http://files.reishorerealty.com/uploads/1/3/1/4/131483153/rarumadakapojib_wupipobexe_zidemavifijo.pdf
    • http://pozerom.shhschoir.org/uploads/1/3/1/1/131164250/tivuxegipige.pdf
    • https://cdn.shopify.com/s/files/1/0437/9544/7970/files/rational_fasting_challenge_hulse.pdf
    • https://cdn.shopify.com/s/files/1/0434/4535/4658/files/64044428792.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/acrobat_star_show_apk.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/24453665549.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/70070992242.pdf
    • https://cdn.shopify.com/s/files/1/0432/0644/3176/files/24510397461.pdf
    • https://cdn.shopify.com/s/files/1/0431/8219/4847/files/hrithik_bike_racing_game_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0438/8985/2568/files/85818844977.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/9158575604.pdf
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/karateka_classic_apk_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0436/9580/0475/files/tadugojevazinakorumurirag.pdf
    • https://cdn.shopify.com/s/files/1/0457/7093/2390/files/pre_kindergarten_phonics_worksheets.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_off00009c27.bin
4c4e9559d3a82284ecb0f1acd61302e86f1c2fcb49480cae5fd436bdfe4d2ed6
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C27 5088 bytes
font_01_sfnt_off0000ad71.bin
255d445bfed4a16e68990927c008fa46314a97a0509ebc36bc9bceb253d22ab8
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD71 11016 bytes