Malicious PDF — malware analysis report

Static analysis result for SHA-256 89761976dc630862…

MALICIOUS

PDF

47.3 KB Created: 2020-09-03 13:39:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58239c7c943e7f147a0b41acccf6f3c0 SHA-1: acc67927bf52c30b59586681c6339dab6e282811 SHA-256: 89761976dc63086223609f799c600b3eb360ddb95ca04d0398c9c60b5eeb1122
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, suggesting a social engineering lure. The primary malicious URL, 'https://ttraff.me/wix?keyword=auralic+vega+manual', is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to the product 'Auralic Vega' and the tool 'wkhtmltopdf', indicating a likely attempt to disguise the malicious link as a relevant manual. No scripts were extracted from this sample.

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=auralic+vega+manual
    • https://static.usrfiles.com/ugd/834936_43f0b54168e04a598ab2aac80fac114a.pdf
    • https://static.usrfiles.com/ugd/37987b_f9769cfac2284948aea9e7eb789d7331.pdf
    • https://static.usrfiles.com/ugd/dcfb95_5da3c17c5f7942b7b57adb28b5aeb386.pdf
    • https://static.usrfiles.com/ugd/b8c837_36c939219dcd4e2ba3d00a4f8ec0ad36.pdf
    • https://static.usrfiles.com/ugd/b8c837_574b4fec45da492e8caa4cedde46f2f9.pdf
    • https://static.usrfiles.com/ugd/9e41f0_c48773d5615c4291b88140369aa11e24.pdf
    • https://static.usrfiles.com/ugd/b8c837_9189c0d0b57d498f90bb808ddc05231a.pdf
    • https://static.usrfiles.com/ugd/aa14a9_7f6aa774ddb646da8de01e43c3f7585a.pdf
    • https://cdn.shopify.com/s/files/1/0434/9673/4885/files/93856035396.pdf
    • https://cdn.shopify.com/s/files/1/0431/6554/8708/files/english_words_for_grade_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/8014/7359/files/xokedazigumapalizab.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/veviwupepepijoxere.pdf
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/gozasonemajefulotamir.pdf
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/wobupubugasoferokiragonu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6872/7194/files/atomisme_logis.pdf
    • https://cdn.shopify.com/s/files/1/0464/9156/6248/files/how_to_behave_with_others.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_off00007c8f.bin
2ed8e60418302a83d5356d09f43a3c87284a414929743c4ee110bea6999069c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8F 4988 bytes
font_01_sfnt_off00008d78.bin
23108e2566f20a3aed4ea791e009d4dafe258d3749f6cab4764a7be2e6222ee5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D78 10212 bytes

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