Malicious PDF — malware analysis report

Static analysis result for SHA-256 9461e119c4daf9ed…

MALICIOUS

PDF

45.4 KB Created: 2020-08-06 20:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae5170e1e2127788a152d8165fcd8a4d SHA-1: 33689c41940414dacde17040c08158bf89d73d80 SHA-256: 9461e119c4daf9ed9ebc772db76a4237dc232b145ad185c3b0e05c48cbde01cf
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to benign Shopify URLs, but one critical link redirects to a known malicious domain, ttraff.com. This suggests a link farm or SEO poisoning technique to disguise malicious redirection. The document body, though heavily obfuscated, contains the malicious URL, indicating an attempt to lure users to a malicious site under the guise of providing a document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=arnold+toynbee+a+study+of+history+pdf
    • http://files.sunsethouseandgardens.com/uploads/1/3/1/1/131164063/beroxuw-wusamelizabu-lutinelexuted.pdf
    • http://lasexili.1beautifulyou.com/uploads/1/3/2/7/132741555/400ecbd5d67cea.pdf
    • http://files.cardinalbeadcreations.com/uploads/1/3/1/0/131070792/jutab.pdf
    • https://cdn.shopify.com/s/files/1/0435/5306/3063/files/tecumseh_engines_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/7813/2636/files/31219306984.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/50162204418.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49893706483.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17810153535.pdf
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/58186581622.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/getawu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9746/4731/files/folujovorujapinemawoka.pdf
    • https://cdn.shopify.com/s/files/1/0450/2568/9758/files/topological_sort_python.pdf
    • https://cdn.shopify.com/s/files/1/0432/2181/1362/files/normalidad_y_anormalidad_en_psiquiatria.pdf
    • https://cdn.shopify.com/s/files/1/0438/2267/8173/files/44902483298.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/givitajibumajakasobago.pdf
    • https://cdn.shopify.com/s/files/1/0435/1174/2628/files/62739518685.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_off000073e4.bin
7c8789bdf3f9e8e905a61d04082e2d1e4bf7db669eb04464249ff30a21130834
pdf-font-stream PDF embedded font (sfnt) at offset 0x73E4 5360 bytes
font_01_sfnt_off0000861b.bin
a0d4f92e3c7ce581c868441910271e0b32b750b562eefde144577e2392a0f6c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x861B 10112 bytes