Malicious PDF — malware analysis report

Static analysis result for SHA-256 c86d7aa0969b5660…

MALICIOUS

PDF

48.3 KB Created: 2020-09-07 23:38:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b86c62d3e158e733d17f988fb2edf73b SHA-1: f754e69a2a8c3e4b07a8b0db4da696347babdaf9 SHA-256: c86d7aa0969b56602290396408f357ec313e88a5b199a11c0ccdc783df039d92
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the malicious URL. The presence of a link farm suggests an attempt to distribute malicious content or conduct phishing operations by leveraging SEO techniques to attract unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/wix?keyword=blackberry+classic+q20+android
    • https://static.usrfiles.com/ugd/abd6ea_7ae2a499aa514944b6a87afdcee522fc.pdf
    • https://static.usrfiles.com/ugd/54bec1_679a5094343242d8980621b3f0a01794.pdf
    • https://static.usrfiles.com/ugd/8ff694_fa91d1230f0f4f0ca25dd29e87c1bb10.pdf
    • https://static.usrfiles.com/ugd/d55797_ce12f72bcee447d3adb0a5287aecc3cf.pdf
    • https://static.usrfiles.com/ugd/0789d5_e120875217504f85820425c4763b0ade.pdf
    • https://cdn.shopify.com/s/files/1/0436/2603/7411/files/hinduism_beliefs_and_practices.pdf
    • https://cdn.shopify.com/s/files/1/0435/6282/7935/files/68994275074.pdf
    • https://static.usrfiles.com/ugd/b8c837_cea0e7fddef34c329f71ace3b7fb39fe.pdf
    • https://static.usrfiles.com/ugd/ba3095_0313b2d2d8b0453aae8ae8f56bed8c31.pdf
    • https://static.usrfiles.com/ugd/353d00_6337c3d0a5b34e2691b72ab954d26edc.pdf
    • https://cdn.shopify.com/s/files/1/0434/3237/8517/files/32611453496.pdf
    • https://cdn.shopify.com/s/files/1/0435/1436/4059/files/7261593604.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/pendidikan_di_amerika_serikat.pdf
    • https://cdn.shopify.com/s/files/1/0453/6303/6315/files/discrete_topology.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065aa.bin
02a844d58c3860574787670fb7e235c897fabae97f47fc9bf62389c738701dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65AA 5396 bytes
font_01_sfnt_off00007802.bin
6659f55e525607e6478ef9516c19e204234266da067ac165fc95f295c3e1c4ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7802 15556 bytes
font_02_sfnt_off0000a69b.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA69B 4324 bytes

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