Malicious PDF — malware analysis report

Static analysis result for SHA-256 3113b7fb02b5004e…

MALICIOUS

PDF

48.8 KB Created: 2020-08-17 18:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4514d6e908cbd3e48bf56d1f7faadc7a SHA-1: 6428877d2b0cee2e9e635a28cae70687c0f6adc1 SHA-256: 3113b7fb02b5004e36cff8f8fe3502d7321d6dd9a3f23adb1190344fed78394c
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one heuristic firing indicating it's a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for song downloads, and a heuristic also flagged a visual download button. The primary malicious link, https://ttraff.cc/pify?keyword=bang+bang+film+songs+ming, is likely used to redirect the user to a further malicious destination. Another embedded link points to a PDF hosted on Shopify, which is likely part of a link farm to improve SEO for malicious content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=bang+bang+film+songs+ming
    • http://files.illlaladesigns.com/uploads/1/3/0/7/130740625/94f3e9ddfc.pdf
    • http://vowodat.championparty.com/uploads/1/3/2/8/132814930/wunarugenosijakegan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovaje.pdf
    • https://cdn.shopify.com/s/files/1/0438/2910/0701/files/33798726163.pdf
    • https://cdn.shopify.com/s/files/1/0438/0504/8994/files/15541622881.pdf
    • https://cdn.shopify.com/s/files/1/0435/6040/3103/files/4g_speed_video_er.pdf
    • https://cdn.shopify.com/s/files/1/0432/8144/9124/files/algebra_2_math_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/32102677584.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/49130461843.pdf
    • https://cdn.shopify.com/s/files/1/0434/3712/9895/files/acting_cover_letters.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/89934223822.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_off000073d4.bin
39d338bd845782f7c8e4c4675316c590dfd3b39cab535162d8b9eab824c7fcfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D4 5180 bytes
font_01_sfnt_off0000856a.bin
1e90a2f743003459c1b5b26226acad625ec077e96a97984bbdcdbd4c2bbb229b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x856A 15896 bytes

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