Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c6de5ce6a0b8e22…

MALICIOUS

PDF

44.2 KB Created: 2020-09-02 06:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3d7b199ab5790bef7cfc9afb725c502 SHA-1: 8a994766c906e825ef2c248e22c93a5f85d37dd6 SHA-256: 7c6de5ce6a0b8e22847c469a9ee59413b81ff140332420f99a0f3ab3aac2014a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a marriage biodata template. The ML classifier strongly indicated maliciousness, and the PDF structure includes a link farm, suggesting SEO manipulation to attract victims. Although no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector strongly suggest an attempt to lead the user to a malicious site, likely for further exploitation or phishing.

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.ru/wix?keyword=marriage+biodata+template+in+marathi
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://static.usrfiles.com/ugd/0baf77_dbdbff5ecc124011ac04dde0caeac1e3.pdf
    • https://static.usrfiles.com/ugd/f65175_4fbe179e89f04a5d88fe354d495e063f.pdf
    • https://static.usrfiles.com/ugd/fa6f14_31cecd51d59e49f7901286626d890f48.pdf
    • https://static.usrfiles.com/ugd/b8c837_94f15a7589ab442185a06ff5ac978955.pdf
    • https://static.usrfiles.com/ugd/e73fea_9dc14f3060a342eb8cb026963ce053aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_6179b3ed0bff4befaad311c9379ff390.pdf
    • https://static.usrfiles.com/ugd/ee4d88_e088e93996f442439c503f481045db9d.pdf
    • https://static.usrfiles.com/ugd/314c35_ad55e5b16e444c4e95a3568ac4edd0c9.pdf
    • https://static.usrfiles.com/ugd/2b25e8_2f67ff7097da4b30b88692483898f1ff.pdf
    • https://static.usrfiles.com/ugd/3f8d85_84e97e6457a04fd9bd5c1d2cd7ca2602.pdf
    • https://static.usrfiles.com/ugd/2f3216_d2f4d245f6524f10abd2461a35cf1e7e.pdf
    • https://static.usrfiles.com/ugd/b8c837_40fac45572904770b6423b61e4f8c578.pdf
    • https://static.usrfiles.com/ugd/40512e_aaf6d63db2274f92a3496499697164c3.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3920/files/vaked.pdf
    • https://cdn.shopify.com/s/files/1/0436/5221/9030/files/hornos_y_calderas_industriales.pdf
    • https://cdn.shopify.com/s/files/1/0435/5575/0049/files/sorofawuvisimizozuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/0292/0086/files/29048614082.pdf
    • https://cdn.shopify.com/s/files/1/0433/8706/0375/files/cardiac_sternal_precautions.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006018.bin
01d799c5550cff634b32ae6a5e5fdfde1c07afe584ddb99298b9a85c54bc75ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6018 5340 bytes
font_01_sfnt_off00007217.bin
d712d2b61b753836bdbce59adf9cf7314d4091165a4dbdc321cfab9fe588326b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7217 9708 bytes
font_02_sfnt_off0000939d.bin
5b8ba9ee1ca1195f203575f31734d6c185ef89452cccc18efbb8125c75d46c84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x939D 4284 bytes

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