Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4574fe3f3f45d68…

MALICIOUS

PDF

41.7 KB Created: 2020-08-12 03:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57f58807367148710cda7a826cdc4dfc SHA-1: 7075fb64d498c6f83a704b067bbbbcfb1dbb1a91 SHA-256: b4574fe3f3f45d6878f6bcdcff666be1a29afa62a37808a8ccd93d3d39c8180e
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to interview questions and the redirector URL itself. This suggests a phishing attempt where the user is tricked into clicking a link under the guise of downloading useful content, leading them to a malicious site.

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=chemical+engineering+interview+questions+and+answers+for+freshers+pdf
    • http://files.fergusmassagetherapy.com/uploads/1/3/1/1/131164114/fegaf_nobenufom_vibijup.pdf
    • http://files.xiongvfx.net/uploads/1/3/0/8/130874086/6680002.pdf
    • http://files.kidsoutdoorliving.com.au/uploads/1/3/1/4/131407547/rofegowotaver_jutale_gadesi.pdf
    • http://rujalowi.wrprc.org/uploads/1/3/1/1/131164250/3238562.pdf
    • https://cdn.shopify.com/s/files/1/0437/6284/3797/files/68305126983.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/bikoxunusegenuxowudujiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/4975/3507/files/advanced_java_programming.pdf
    • https://cdn.shopify.com/s/files/1/0428/4999/2870/files/47458169334.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8136/files/ropuxaje.pdf
    • https://cdn.shopify.com/s/files/1/0440/8072/6168/files/microplastics_research.pdf
    • https://cdn.shopify.com/s/files/1/0431/4847/6572/files/theory_of_alternating_current_machinery_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/xusaf.pdf
    • https://cdn.shopify.com/s/files/1/0448/0493/1746/files/a_first_course_in_abstract_algebra_fraleigh_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/gewined.pdf
    • https://cdn.shopify.com/s/files/1/0432/1030/9787/files/15310832518.pdf
    • https://cdn.shopify.com/s/files/1/0445/4242/7295/files/improving_speaking_skills.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_off000064a5.bin
5a17f4b98230d33ec0cf63f8614075c563a048a59f607ede865dd2c6b2b4c58f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A5 5752 bytes
font_01_sfnt_off00007815.bin
df20679e3499d2ff175caaf99a63242f7cba9d6c3c20c5fc3487cd772b220230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7815 9888 bytes

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