Malicious PDF — malware analysis report

Static analysis result for SHA-256 23ea768a6fa317e6…

MALICIOUS

PDF

48.3 KB Created: 2020-08-05 12:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 534c1aae7b50695bd4242ac4090586a7 SHA-1: c8776df14ae9c9614a4bd050ad400191c26116e6 SHA-256: 23ea768a6fa317e66da5b219d36e8f31963c837bb358c0801b59d905ebc0953b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One such link, 'https://ttraff.ru/pify?keyword=variables+in+psychology+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of multiple Shopify URLs, some benign and some unknown, indicates a potential attempt to blend malicious links with legitimate-looking ones.

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/pify?keyword=variables+in+psychology+pdf
    • http://files.makeitpersonalllc.shop/uploads/1/3/1/4/131437554/1999985.pdf
    • http://files.patriciastuartnspires.com/uploads/1/3/1/4/131411147/litixoxivez.pdf
    • http://files.drtadeusik.com/uploads/1/3/0/7/130739107/4318922.pdf
    • http://files.teapartypatriotplace.com/uploads/1/3/1/8/131856173/d8d132254f.pdf
    • http://files.chi1833.com/uploads/1/3/1/3/131380063/03ae125.pdf
    • https://cdn.shopify.com/s/files/1/0433/5868/3291/files/rarumor.pdf
    • https://cdn.shopify.com/s/files/1/0430/5285/9543/files/singapore_math_worksheets_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/migunege.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7207/files/fagamexipanododonepo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3140/3423/files/captivated_by_you_sylvia_day_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0443/8307/6518/files/malayalam_kambikuttan_file_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/1708/3803/files/87370797904.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/vt_dmv_license_renewal.pdf
    • https://cdn.shopify.com/s/files/1/0432/4399/5298/files/sibulupepapubuxaxamo.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_off00007eda.bin
22016d8e829e4dc37825989f55476cd682c62746e75bf3fe253ebc850ba29892		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDA 5624 bytes
font_01_sfnt_off000091f6.bin
4037bfac8a89d5261741303436614ff7fee7781e4247646e8ceabe76b1e97b9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91F6 10008 bytes

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