Malicious PDF — malware analysis report

Static analysis result for SHA-256 28617918f3bdbfe7…

MALICIOUS

PDF

50.2 KB Created: 2020-08-30 20:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 798b3ed44e64feedeab56a88afa549ec SHA-1: 899baaab2ec2898c79c3629da69c6e457f42d039 SHA-256: 28617918f3bdbfe77d309159277113cf2553dbcb7775af9f661ca0bf6a08974d
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. This suggests the document is designed to lure users to malicious sites, potentially for phishing or malware distribution. The presence of numerous other PDF links, many hosted on Shopify, indicates a possible SEO link farm tactic to improve search engine ranking for malicious content.

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.ru/wix?keyword=une+cotte+de+maille+en+acier+tremp%25C3%25A9
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/78178506912.pdf
    • https://cdn.shopify.com/s/files/1/0438/0455/7472/files/carbon_sink_definition.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/67652403514.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7255/files/bodyweight_crossfit_workout.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a137896d67c4e77980d30d20b4a3800.pdf
    • https://static.usrfiles.com/ugd/b8c837_feb4ded13b18475f87ee62feb8003bf0.pdf
    • https://static.usrfiles.com/ugd/b8c837_7245456b1c484ab19fe5659808f55a88.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/gemilejipotap.pdf
    • https://cdn.shopify.com/s/files/1/0448/6466/7810/files/anlamli_hikayeler.pdf
    • https://cdn.shopify.com/s/files/1/0430/5305/6149/files/66266135204.pdf
    • https://cdn.shopify.com/s/files/1/0428/8135/1839/files/44997418116.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4840/files/95333669147.pdf
    • https://cdn.shopify.com/s/files/1/0430/7343/7847/files/deeplearning4j_book.pdf
    • https://cdn.shopify.com/s/files/1/0440/6237/6088/files/xenoblade_2_heart_to_heart_guide.pdf
    • https://cdn.shopify.com/s/files/1/0453/6303/6315/files/epidemiologia_del_alcoholismo_en_mexico.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_off00006aa6.bin
3a73b6ccb49202d190448c46f22ab2c69f30648ebfda2a24f50c1efa720d1091		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA6 4964 bytes
font_01_sfnt_off00007b13.bin
92868269b8822ebb90d0dd7f9e9a9acd9f0889e2e54053ade45a8ed73a965718		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B13 16488 bytes
font_02_sfnt_off0000aba5.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABA5 4324 bytes

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