Malicious PDF — malware analysis report

Static analysis result for SHA-256 358aa70f37db9f34…

MALICIOUS

PDF

43.7 KB Created: 2020-08-30 01:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 603cb2ca70972709902761f31b3eff48 SHA-1: 49a1e692aac5cdcc7efd14a989fa1652b82920b1 SHA-256: 358aa70f37db9f34da77985f48052be7803691f6183f1ac0a2d2e544abf0f3c3
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a domain known for redirecting to malicious content. The document body, though heavily corrupted, contains text related to increasing download speed and a URL that matches the malicious redirector. This suggests a phishing or social engineering attack aiming to redirect users to harmful sites.

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.com/wix?keyword=how+to+increase+download+speed+on+windows+10
    • https://static.usrfiles.com/ugd/538d67_8000a702eb5f40aa9a64bddc3ed79b66.pdf
    • https://static.usrfiles.com/ugd/fe83c3_ee09f35c0c644338a052b8a3590ffb75.pdf
    • https://static.usrfiles.com/ugd/429b25_ba03f0fadb974c6bb08d9e47f22cccc6.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c1127fae1fb4ab9bb9ec0952dfa2c52.pdf
    • https://static.usrfiles.com/ugd/2813e2_684f2f900fb34d10856ee5e9167ee700.pdf
    • https://static.usrfiles.com/ugd/b13fd1_44cfd2df89044ec292517b54af9a4549.pdf
    • https://static.usrfiles.com/ugd/1c90dc_5bf110265c8c430c8ba449e949e5d482.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6bbdb41acef4acc80fa663ea4177519.pdf
    • https://static.usrfiles.com/ugd/253000_4c9abd9266024d94b6da4bfbce5053c3.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7959/files/libro_los_compas_y_el_diamantito_legendario.pdf
    • https://cdn.shopify.com/s/files/1/0432/4530/6011/files/the_hobbit_study_guide_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/0859/6900/files/css_font_family_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/4444/6118/files/27712408927.pdf
    • https://cdn.shopify.com/s/files/1/0433/3069/9414/files/surya_kriya_guide.pdf
    • https://cdn.shopify.com/s/files/1/0436/9186/8310/files/31720755259.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/grade_3_math_practice_workbook.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_off00006c78.bin
4dbe804737832df8b3d821ed7ee545c18224d82805cff0d42dac10c1987cd2c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C78 5316 bytes
font_01_sfnt_off00007ea0.bin
8fbf1bbcfdfaad4de11422f8a92063d4824c14f3cb1851a7f14daec023f29f19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA0 10276 bytes

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