Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ab60c2b6eb7f29…

MALICIOUS

PDF

41.9 KB Created: 2020-08-27 20:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6fe8728470ef255fee36149718e2fdb SHA-1: 14d88e775e0f3f58f03e78328c8ace1b77e744cc SHA-256: b9ab60c2b6eb7f2902e9d8d0b153978d86a2597e5bb9b91f3ed03f07c7a7bd93
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or social engineering attempt. The document body, though heavily obfuscated, contains text related to a 'leawo itransfer registration code 2018' and the malicious URL, suggesting a lure to trick users into clicking. The presence of numerous external PDF links further supports the SEO link farm heuristic, likely used to obscure the malicious redirector.

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.cc/pify?keyword=leawo+itransfer+registration+code+2018
    • http://tononibif.momspantrykitchen.com/uploads/1/3/2/7/132740708/f850908a.pdf
    • http://files.d-ark.info/uploads/1/3/1/3/131383860/tonepineguvurif.pdf
    • http://belalim.lah-ufrj.org/uploads/1/3/0/7/130775792/3286474.pdf
    • http://files.addaihealthedu.net/uploads/1/3/1/3/131380618/2087346.pdf
    • http://files.threeatlantacats.com/uploads/1/3/1/4/131453247/dbd7ca9be93.pdf
    • https://cdn.shopify.com/s/files/1/0438/9126/1595/files/7415673284.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gigogew.pdf
    • https://cdn.shopify.com/s/files/1/0431/5706/1796/files/happy_sunday_beautiful_images.pdf
    • https://cdn.shopify.com/s/files/1/0437/1814/8261/files/47796231293.pdf
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/holistic_assessment_in_nursing.pdf
    • https://cdn.shopify.com/s/files/1/0437/5461/9041/files/worksheet_2._2_limits_and_continuity_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/0046/1474/files/14773258029.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/50714426266.pdf
    • https://cdn.shopify.com/s/files/1/0429/4954/2041/files/seek_thermal_compact_pre_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/74157310697.pdf
    • https://cdn.shopify.com/s/files/1/0463/6678/5691/files/anlage_vl_2016.pdf
    • https://cdn.shopify.com/s/files/1/0430/2766/0951/files/36431653851.pdf
    • https://cdn.shopify.com/s/files/1/0433/8964/9054/files/61470583182.pdf
    • https://cdn.shopify.com/s/files/1/0444/3861/8278/files/88784269843.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_off000062ff.bin
9a2d082515385a9f9fe21aae4b66bda89adf8999aa9263a13f6698e860586c1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x62FF 5712 bytes
font_01_sfnt_off00007695.bin
cba29532b3915ec9f53b6feaf331a73019eb079ff38ad175e80f101f5c2c9916
pdf-font-stream PDF embedded font (sfnt) at offset 0x7695 10540 bytes