Malicious PDF — malware analysis report

Static analysis result for SHA-256 23aa0881bb0a8441…

MALICIOUS

PDF

42.7 KB Created: 2020-08-23 19:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c056057e81b6afba2278bc64f829fce0 SHA-1: b4811e8cf7632ffee4739329cded511c33976ad6 SHA-256: 23aa0881bb0a8441e73b5e3bb6d61f827e8e67597418e5ed64b9c475911c2eb9
128 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'casino games offline apk' and includes the malicious redirector URL. This suggests a lure to download potentially malicious content, masquerading as a game. The PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics confirm the presence of link farming and redirection to known malicious infrastructure.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=casino+games+offline+apk
    • http://luxifu.anotherretrothing.com/uploads/1/3/2/7/132741194/welelazadome.pdf
    • http://gavaliki.wsfishfarm.com/uploads/1/3/1/4/131454012/4289767.pdf
    • http://files.knoxsundridge.ca/uploads/1/3/1/6/131636941/dukuzidezuzupa.pdf
    • http://daladu.lifeisbeautifulandhealthy.com/uploads/1/3/2/3/132303195/8790470.pdf
    • http://files.customerfocusedlearning.com/uploads/1/3/0/7/130738814/bavajesapamukogobos.pdf
    • https://cdn.shopify.com/s/files/1/0433/6756/3429/files/alif_novel_episode_10.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/ashab_e_kahf_book_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0157/5586/files/doctor_faustus.pdf
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/kekametulaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/55638086367.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/nipijukavofilujegagulejob.pdf
    • https://cdn.shopify.com/s/files/1/0438/1461/7250/files/6012371751.pdf
    • https://cdn.shopify.com/s/files/1/0459/2258/2679/files/gugite.pdf
    • https://cdn.shopify.com/s/files/1/0465/1453/6598/files/body_scanner_app_real.pdf
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/37576940012.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/25911802201.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_off00006ae4.bin
34c3670ae8abdaaa565efd2b9a9a094507e7f7bc966480b98d41c270ab8b050b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE4 5092 bytes
font_01_sfnt_off00007c2b.bin
6eab7a2f536e5e9691e76a69caba999c87884cd99980d4fa9bbb3aeba107b201
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2B 10120 bytes