Malicious PDF — malware analysis report

Static analysis result for SHA-256 da29bdf0167ed199…

MALICIOUS

PDF

39.3 KB Created: 2020-08-13 21:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52a55082ef64f904a85f7ed521ea96d1 SHA-1: 73e5a2be12bced574af0307a005a060195f9d08b SHA-256: da29bdf0167ed199599e1f7a76c02216f347788df3fbbc52f5ea370d7df4766b
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a redirector link pointing to a malicious domain. The document body, though heavily obfuscated, contains text related to 'Ashrae psychrometric chart pdf english units' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous external links, many hosted on Shopify, indicates a link farm designed to obscure the final destination.

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/pify?keyword=ashrae+psychrometric+chart+pdf+english+units
    • http://files.evodiacreative.com/uploads/1/3/0/8/130815009/fuxugafok.pdf
    • http://files.jrobsessions.com/uploads/1/3/1/0/131070325/xarikojiz.pdf
    • http://files.lawrencequill.com/uploads/1/3/0/7/130740538/rizenaxi_fisafotejoma_wivob_jifokuxenak.pdf
    • https://cdn.shopify.com/s/files/1/0431/4896/8100/files/anaconda_python_3_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0429/2611/2927/files/alter_ego_plus_3_guide_pedagogique.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93861148098.pdf
    • https://cdn.shopify.com/s/files/1/0431/0525/5577/files/22672089470.pdf
    • https://cdn.shopify.com/s/files/1/0439/5529/0270/files/accurate_english_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/94739955091.pdf
    • https://cdn.shopify.com/s/files/1/0437/9515/3058/files/kumirawavuwigaferuxug.pdf
    • https://cdn.shopify.com/s/files/1/0436/4386/3198/files/cummins_diesel_engine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/domamusuvusuzexi.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_off0000573d.bin
b2af0cc7af2184a8e001a1544716494e6a55419e5ac5b545a370b18c3ddf3cd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x573D 5660 bytes
font_01_sfnt_off00006a5a.bin
e528feac504c2d1cc261b5f5a42ef4b9cc25ffbfb91a3cc59c38595653a91560		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5A 11164 bytes

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