Malicious PDF — malware analysis report

Static analysis result for SHA-256 945d8eae4b1586c9…

MALICIOUS

PDF

41.3 KB Created: 2020-09-05 17:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85d6f5d2a6cd4b955ae4b69753cbcc8f SHA-1: bca907a5b319d2641c0361b352995baee6bc66d1 SHA-256: 945d8eae4b1586c99a42c6a81608b9c661f8b58db0fd8850397cae2a4b260ce4
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many hosted on Shopify, designed to appear as legitimate educational resources. One prominent link, disguised with a search query for 'finding average worksheets 5th grade', redirects to a known malicious domain (ttraff.me). This suggests a SEO poisoning or link farm attack aiming to drive traffic to malicious infrastructure.

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=finding+average+worksheets+5th+grade
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/duwejijoveguw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4023/files/western_blot_technique.pdf
    • https://cdn.shopify.com/s/files/1/0438/3870/1728/files/revealing_module_pattern.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/illinois_aldermanic_form_of_government.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0136/files/14078167669.pdf
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/34290434248.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/xopepu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/gunuruwe.pdf
    • https://cdn.shopify.com/s/files/1/0435/2668/4824/files/technical_stock_analysis_bollinger_bands_and_rsi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7712/4764/files/45218146520.pdf
    • https://static.usrfiles.com/ugd/86319b_9f8c7a432c0e4fcd9e9cc19d7e73cc2d.pdf
    • https://static.usrfiles.com/ugd/6f7357_74493c77f5954f9c8bee714e76fa5bbc.pdf
    • https://static.usrfiles.com/ugd/599026_c54b33ad772f422cacc2d76b393f024e.pdf
    • https://static.usrfiles.com/ugd/b8c837_18fe68ca1e7e40acbd423d7fe664a782.pdf
    • https://static.usrfiles.com/ugd/9c8fb9_5f3e139d70ec46ca934321988adb2ede.pdf
    • https://static.usrfiles.com/ugd/9f06f8_ab2c1dfb6ee744b9910603e3996721ba.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_off00006184.bin
50c4d132fcc1b67a3844520312dc96a2610983d25aa2582f8805762703b868e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6184 5352 bytes
font_01_sfnt_off000073ce.bin
d7e4f9e79371540227ea531e822ec9f7c798dd7e3720160f4dd8d4b3ef66c830		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73CE 10588 bytes

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