Malicious PDF — malware analysis report

Static analysis result for SHA-256 d828c50d234a89d7…

MALICIOUS

PDF

76.2 KB Created: 2020-09-01 09:29:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92210de755a000dcf7a3ae8b38a074ff SHA-1: 8add0d9a288bab66161176ecc2cfdfded3e1e5bd SHA-256: d828c50d234a89d7e079c3ccbbb33589d7fbfb8ff0b78b0447c1eee55df4a238
120 Risk Score

Malware Insights

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

The PDF file contains a direct link to a malicious redirector, disguised as a search result for a specific query. The document body, though heavily obfuscated, contains the same URL. The presence of a large number of external PDF links suggests a link farm or SEO poisoning attempt to drive traffic to malicious infrastructure.

Heuristics 3

  • 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.
  • 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/wix?keyword=hangaroo+answers+star+wars+character
    • https://static.usrfiles.com/ugd/61f964_393a08171411477dae3e5ca3aebc8455.pdf
    • https://static.usrfiles.com/ugd/f46427_c58c6589ca2b4e84b19441388cd1d20c.pdf
    • https://static.usrfiles.com/ugd/3d0627_0067aa7d239f4e299fef93ef33c0df99.pdf
    • https://static.usrfiles.com/ugd/895bef_182e00eb75734fce8581b70217a29a31.pdf
    • https://static.usrfiles.com/ugd/16a96a_a4ad52c6c21a4482a797f0b71a9364da.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/rolujakazadisurudotalazu.pdf
    • https://cdn.shopify.com/s/files/1/0448/0778/2557/files/soburuvalega.pdf
    • https://cdn.shopify.com/s/files/1/0428/9747/3699/files/61064936404.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2454/files/96154445769.pdf
    • https://static.usrfiles.com/ugd/b8c837_3583a24750774a0a90537facee6b04d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a137896d67c4e77980d30d20b4a3800.pdf
    • https://static.usrfiles.com/ugd/fd3290_706e54d2efcb4af4bc4d43bbbbf221de.pdf
    • https://static.usrfiles.com/ugd/54fa57_c722c6b5e2c4438dbeb239d9b601042b.pdf
    • https://cdn.shopify.com/s/files/1/0437/7214/9921/files/acer_android_tablet_not_charging.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/69756241193.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/dujew.pdf
    • https://cdn.shopify.com/s/files/1/0435/1167/7083/files/vifaxorisi.pdf
    • https://cdn.shopify.com/s/files/1/0460/7043/1908/files/nicomachean_ethics_martin_ostwald_pd.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_off0000e792.bin
d34c52fcb26336b205dfb1c300e56c71bb903783695cf7f63f574258994a7833		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE792 5080 bytes
font_01_sfnt_off0000f8e5.bin
175e7a0548fe7356de9d9b68ea882f2fceb4dc3b588285031323512c89f1da11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E5 13608 bytes

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