Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1e59bf3ba5f725…

MALICIOUS

PDF

57.7 KB Created: 2020-08-02 20:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fbb6269f6aececa200014ef0b7a635f SHA-1: 7b9cd7be8786dcc1567e4fa4e6c3f648ca457daa SHA-256: 7b1e59bf3ba5f7251cc4d2bfd00773ca3a474800de96b59fa7a9970734a63837
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=inorder+successor+in+bst'. The document body, though heavily obfuscated, also contains this URL. The presence of a large number of external links, including a malicious redirector, suggests an attempt to either distribute malware or engage in SEO manipulation for malicious purposes.

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.com/pify?keyword=inorder+successor+in+bst
    • http://files.theyarnandi.com/uploads/1/3/0/7/130739780/pozuxatajigeta.pdf
    • http://files.ameliawilliamsmosaic.com/uploads/1/3/1/1/131164260/livudiwuxupaf-rimerumur-nuwaduvatixi.pdf
    • http://files.wagnwalkchicago.com/uploads/1/3/1/4/131408502/4bfa57.pdf
    • http://files.sweetlyhosted.org/uploads/1/3/1/6/131606789/028bb820feecbc.pdf
    • http://files.wkuprecollegepiano.com/uploads/1/3/1/4/131454165/2029689.pdf
    • https://cdn.shopify.com/s/files/1/0435/4647/6708/files/gagazebelekikavavidafoxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/xibozinel.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/8294640629.pdf
    • https://cdn.shopify.com/s/files/1/0435/7763/9075/files/rukereseduzulidunite.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6345/files/dirty_newlywed_game_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dotedijulukamani.pdf
    • https://cdn.shopify.com/s/files/1/0437/1228/2789/files/10725635969.pdf
    • https://cdn.shopify.com/s/files/1/0434/2058/2050/files/jasuzadokazojeketu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8899/3699/files/tatiges.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/welilavuruwad.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/9492064649.pdf
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/victory_road_emerald.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://leetcode.com/problems/inorder-successor-in-bst/
    • 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_off00009b4e.bin
41e78a6359e4746f26535753ad2887a68c83d64cd98f546658d6f529da6c0ca5
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B4E 4768 bytes
font_01_sfnt_off0000ab8d.bin
a3715642c63165acfe22ddc1923f247a3507975916031b0cbddc3e6a85f53d36
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB8D 14300 bytes