Malicious PDF — malware analysis report

Static analysis result for SHA-256 535188111c70bc35…

MALICIOUS

PDF

47.3 KB Created: 2020-08-06 18:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12ed136656146a8a8758335739cba6b3 SHA-1: f55e768e6eb273e25eb816a09291daea0015e055 SHA-256: 535188111c70bc353f668e4f6603f2ef8a38e4c07cce12818ff427af8cf294ce
152 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a redirector service, which in turn leads to a malicious domain. The document body, though heavily obfuscated, contains text related to 'highlight pdf on mac' and lists numerous URLs, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The primary malicious URL is ttraff.com, identified as a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=highlight+pdf+on+mac
    • http://files.msdanielledobeleit.com/uploads/1/3/1/8/131857723/marutuke.pdf
    • http://files.koalaremedies.com/uploads/1/3/1/1/131164117/6726137.pdf
    • http://files.movetoamendpdx.org/uploads/1/3/2/6/132695546/rifuzufifap_simewo_wiseduzum.pdf
    • http://files.wyeriverwinds.com/uploads/1/3/0/8/130873758/foguvaroxope.pdf
    • http://files.highplainsarena.com/uploads/1/3/2/6/132681308/9811210.pdf
    • https://cdn.shopify.com/s/files/1/0439/1878/6728/files/444022521.pdf
    • https://cdn.shopify.com/s/files/1/0431/4516/7008/files/convert_cartesian_to_spherical.pdf
    • https://cdn.shopify.com/s/files/1/0435/6472/8479/files/nivufomuxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1190/7488/files/26621444506.pdf
    • https://cdn.shopify.com/s/files/1/0435/5008/1183/files/drop_table_rails.pdf
    • https://cdn.shopify.com/s/files/1/0430/3673/7699/files/.pdf_52a069e0-1021-4aca-8480-4d5105a39341
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/larawolumelegala.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25843483079.pdf
    • https://cdn.shopify.com/s/files/1/0440/7102/6853/files/1999_jaguar_xjr.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/bebatikoreboboxuj.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006199.bin
0e87cd05f332aeb2a72b3daf131c0310eff8a4a40b86507956a7cca2f5d1d305		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6199 6168 bytes
font_01_sfnt_off0000713b.bin
29bbf8320334d042653f442dd0f05a21a21f8b2dd4e178a208ebd29ea2c01e25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x713B 5256 bytes
font_02_sfnt_off000082f8.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82F8 1800 bytes
font_03_sfnt_off00008b86.bin
86c162f5ec6ad3ccf406367835aabfe24336e44572b0d25b3fdd140ba5c7c0fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B86 11028 bytes

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