Malicious PDF — malware analysis report

Static analysis result for SHA-256 c15749cbe06a7134…

MALICIOUS

PDF

55.2 KB Created: 2020-08-20 14:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c05cc53a0d40abd89435209600895c4d SHA-1: fef5bbe19b75943f43887e9cfd89a1962e631736 SHA-256: c15749cbe06a713452f05f6bc6f7fbc49ed2522c1b0318b94fbd769fb2036bcb
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at https://ttraff.ru/pify?keyword=cinema+4d+basic+tutorial+pdf. This suggests the document is designed to lure users to malicious infrastructure under the guise of providing tutorial content. No scripts were extracted, but the PDF structure and link farm indicate a social engineering-based delivery mechanism.

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.ru/pify?keyword=cinema+4d+basic+tutorial+pdf
    • http://files.upperclementscottages.com/uploads/1/3/0/8/130814492/rebeki.pdf
    • http://jogagumek.skilledpaint.com/uploads/1/3/1/0/131070894/jidebuzizeva.pdf
    • http://files.toprodbassmasters.com/uploads/1/3/1/4/131438641/wefevuv-disuronu-rozovajuvamop-vitigodelanulo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7817/3343/files/wejejalotasibilowugemina.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/navijutawujepazupipip.pdf
    • https://cdn.shopify.com/s/files/1/0432/7967/9646/files/regepokofewipitif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68513135127.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6983/files/warcraft_3_classic.pdf
    • https://cdn.shopify.com/s/files/1/0437/8719/0434/files/australian_map_template_printable.pdf
    • https://cdn.shopify.com/s/files/1/0430/1658/5379/files/xomitirexegel.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0309/files/skype_old_version_for_windows.pdf
    • https://cdn.shopify.com/s/files/1/0433/8748/6358/files/voices_carry_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30072581460.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6927/files/economics_in_one_lesson_free_download.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_off00009ba0.bin
000c0fd3306834eb2de9dbbfefa31b116e30afcd3a68f0b6be2fea2564c22233		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA0 5436 bytes
font_01_sfnt_off0000adf7.bin
db3fdf60d34632c688aa4bdf8fabb7c37a37e4f06a538629bc17fe4c7d01277a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADF7 9972 bytes

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