Malicious PDF — malware analysis report

Static analysis result for SHA-256 1172753dd6a47c55…

MALICIOUS

PDF

66.8 KB Created: 2020-08-31 12:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6daa8ffcdc6a4a5230d859429ddb5fe8 SHA-1: ee1852b2704aa8cf07ff44fbd676594078f33b65 SHA-256: 1172753dd6a47c55df74f84162c60a542226f7a81a6eb4e485389f6f40bad51f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.cc/wix?keyword=how+to+write+a+bestseller+sims+4. The document body, though heavily obfuscated, appears to contain this URL, suggesting a phishing or scam attempt. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation or to distribute malicious content.

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.cc/wix?keyword=how+to+write+a+bestseller+sims+4
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_d6b7d4e6566648ff8d62b88f85dfd127.pdf
    • https://static.usrfiles.com/ugd/b8c837_d771a117df0c467e8870d4fd291b8aa6.pdf
    • https://static.usrfiles.com/ugd/b7306e_28c30e40d065423e8433ef89c9f5dce0.pdf
    • https://static.usrfiles.com/ugd/97634b_00b5fe678eac4f678ca9f816f19774bf.pdf
    • https://static.usrfiles.com/ugd/b4609a_ed85bcc8fcaf4988bd8b085c352fe0b5.pdf
    • https://cdn.shopify.com/s/files/1/0433/8312/8214/files/pekikekuvivomajo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9752/2329/files/85862739661.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2174/files/ac_circuit_nodal_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/32511265233.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/realtor_property_resource_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/wufevinejajepetexave.pdf
    • https://cdn.shopify.com/s/files/1/0438/0111/6833/files/zepilubanidunipijizu.pdf
    • https://static.usrfiles.com/ugd/b52961_712c18a15397495d87f2d4850341a51d.pdf
    • https://static.usrfiles.com/ugd/fbccce_60a5b4df7a554a4191085c100ab8c831.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_b95bda3dd3ce44d18b6e0d2d563a7ca5.pdf
    • https://static.usrfiles.com/ugd/b8c837_165550fb41434e53b50c5e88d018a5fe.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8e5.bin
b4bce584f5f2ae1b27188e910350c52dc0176ed277367f265f2a5e1ccbf65388		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E5 5112 bytes
font_01_sfnt_off0000da43.bin
cbefd5927243cd6944570cf10fe0b65ad3d2caeed7d4c9c9f0b2f869a1467d80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA43 10472 bytes

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