Malicious PDF — malware analysis report

Static analysis result for SHA-256 3209da8fdcae360e…

MALICIOUS

PDF

41.7 KB Created: 2020-08-12 14:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5e9b6523df5fbd7099b801be58a69ee SHA-1: 8342a48b976ffe106b57da253054b89504a62a48 SHA-256: 3209da8fdcae360e9c1dacb66167c0019e008fbba6078b57f22286aa80f5d99a
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, https://ttraff.com/pify?keyword=vitalsource+bookshelf+download+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify URLs, suggesting a lure to download content. The presence of a malicious redirector indicates an attempt to lead the user to a harmful destination.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=vitalsource+bookshelf+download+pdf
    • http://files.lauracheetham.com/uploads/1/3/1/3/131384771/soxopon-dekujediw-vuzolekujuwidix.pdf
    • http://gafikarak.homeinspectorengineers.com/uploads/1/3/1/6/131636948/dopivav.pdf
    • http://files.rsschool.org/uploads/1/3/1/6/131606256/vejora-kamokafuduz.pdf
    • http://files.teamemfield.com/uploads/1/3/1/3/131379792/61233.pdf
    • http://gopagoz.africananimalworld.com/uploads/1/3/1/4/131453133/mejedupilib.pdf
    • https://cdn.shopify.com/s/files/1/0430/5430/1338/files/96033405892.pdf
    • https://cdn.shopify.com/s/files/1/0430/5662/7866/files/10642124676.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0813/files/exceptional_c_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/najebixidij.pdf
    • https://cdn.shopify.com/s/files/1/0429/1615/1455/files/11825257526.pdf
    • https://cdn.shopify.com/s/files/1/0432/0729/5140/files/xufivora.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fupibi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8113/8343/files/sebulutemetod.pdf
    • https://cdn.shopify.com/s/files/1/0438/0088/7456/files/36071349516.pdf
    • https://cdn.shopify.com/s/files/1/0428/9550/7622/files/zuverujomegavafurat.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8613/files/wobapejumoxaginux.pdf
    • https://cdn.shopify.com/s/files/1/0437/3138/6529/files/springboard_algebra_2_unit_1_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1702/files/volvo_a25c_service_manual.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_off00005592.bin
3d45299dd388a53dd8d8337cd0bb93b1177faa7e3a66efae348daa8554844126		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5592 5384 bytes
font_01_sfnt_off000067e0.bin
be494e5eabd7378e52a783d58f482dd14bbd863df2f1a244793abcd8310e63b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E0 10440 bytes
font_02_sfnt_off00008bb0.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB0 4324 bytes

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