Malicious PDF — malware analysis report

Static analysis result for SHA-256 511bdd918926468b…

MALICIOUS

PDF

43.0 KB Created: 2020-08-02 18:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0778c50887b8c24d4bd37e6499aacc4 SHA-1: 657bea47ca87e8e14a6c7730911c92063a8cd15f SHA-256: 511bdd918926468b45c6389e6a54cc7ef6360969a1ed162601fee7d2fc1f132e
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL pointing to a site associated with malicious activity. The document body, though heavily obfuscated, contains the same redirector URL and a reference to 'calamari hack roblox', suggesting a lure to exploit interest in gaming or hacking. The presence of a download button heuristic further supports the malicious intent of directing users to external content.

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.ru/pify?keyword=calamari+hack+roblox
    • http://files.bestinthewestevents.com/uploads/1/3/1/8/131871650/fesowinebiwodon.pdf
    • http://files.santafefilmsguide.com/uploads/1/3/0/9/130969965/gakukitubetet-lufomome-vofebedanajobid.pdf
    • http://files.oe-suppliers.org/uploads/1/3/1/1/131163667/voxemisofomodaz-ririlinagegize-digozokose.pdf
    • http://files.sandrapeut.com/uploads/1/3/1/4/131411411/4544736.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/90087812874.pdf
    • https://cdn.shopify.com/s/files/1/0432/2033/6802/files/10770863264.pdf
    • https://cdn.shopify.com/s/files/1/0439/6577/6030/files/30421856104.pdf
    • https://cdn.shopify.com/s/files/1/0439/0469/6472/files/lolutogumopi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2791/4152/files/48024992227.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/zebubedogituzubumifuduba.pdf
    • https://cdn.shopify.com/s/files/1/0434/3064/1826/files/degijexakomizabugexu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/64352674011.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/busunobadikifegane.pdf
    • https://cdn.shopify.com/s/files/1/0431/1751/0818/files/pepojovupej.pdf
    • https://cdn.shopify.com/s/files/1/0437/0314/0506/files/77367795033.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/86477918810.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/968938228.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c63.bin
0129c4d2218f38a8c8452adc0071da8d2bfa2b90b9426fafd0c8a6919cc77c67
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C63 4640 bytes
font_01_sfnt_off00006c1c.bin
da745b6accb3e22a710bc5524fc0994cb0be0f7934121046bf97cfcc55b20c60
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1C 10708 bytes
font_02_sfnt_off00009075.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x9075 4324 bytes