Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed8b896898ba452a…

MALICIOUS

PDF

70.3 KB Created: 2020-08-19 02:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b48fe1e3a806daf863257300fa9d2032 SHA-1: fe67bba57ed6a69e9ef9cf54016dd753d758a889 SHA-256: ed8b896898ba452a1e149dc8809eea717e2ca907bf9d65a8d547e7b3511eba5b
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a link to 'ttraff.com', a known malicious redirector. The document body, though heavily obfuscated, contains the same lure text as the malicious URL. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting the user to malicious infrastructure.

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=l%2527+architecture+baroque+pdf
    • http://pajigebur.semipermanentmakeupacademy.com/uploads/1/3/1/3/131384169/keredeteg.pdf
    • http://sikagoxe.nygrassfedbeef.com/uploads/1/3/2/8/132814718/ef49cda8f10.pdf
    • http://fuxabufob.alxzandriachantiluke.co.uk/uploads/1/3/1/3/131379578/7020535.pdf
    • https://cdn.shopify.com/s/files/1/0435/6803/8049/files/95310073383.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8646/files/integral_of_trig_functions.pdf
    • https://cdn.shopify.com/s/files/1/0440/0054/2878/files/354199916.pdf
    • https://cdn.shopify.com/s/files/1/0433/4993/4229/files/46508369687.pdf
    • https://cdn.shopify.com/s/files/1/0430/3434/5625/files/acta_constitutiva_de_una_sociedad_civil_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/gungeon_lower_case_r.pdf
    • https://cdn.shopify.com/s/files/1/0431/0050/4217/files/how_to_make_a_bowl_in_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/zaxagegavakanifiko.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/senokanikuvaxidumiboj.pdf
    • https://cdn.shopify.com/s/files/1/0440/7122/3446/files/28931925350.pdf
    • https://cdn.shopify.com/s/files/1/0440/6735/6824/files/12929302442.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/35870593121.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/78069899351.pdf
    • https://cdn.shopify.com/s/files/1/0432/9255/7467/files/leperoputigokikesefibuw.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_off0000d73e.bin
eda26365092f47c0be0cfd0c88c323b49aab542b7e721436069c033bc519337c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD73E 5276 bytes
font_01_sfnt_off0000e91c.bin
ecd06da9505628c4475cbab148d2060da48522ae8cd6114a628ec4e6171d0a4d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE91C 10288 bytes