Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf7e3b374e93f32…

MALICIOUS

PDF

57.3 KB Created: 2020-07-22 21:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b7ca9276f46ab4f2efef2568eeb17fe SHA-1: a95b622b83ebe93895f260fc34acdf3225289c14 SHA-256: 9bf7e3b374e93f3247003325b1c545abb79f6afd6f70c9d121ccca186505b095
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. It also contains a PDF link farm heuristic, indicating a large number of external links, with the first being to 'cdn.shopify.com'. The document body, though heavily obfuscated, contains text related to 'Blanchard macroeconomics 7th edition pdf', suggesting a lure for users searching for this material. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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=blanchard+macroeconomics+7th+edition+pdf
    • http://files.christinaandcanines.com/uploads/1/3/1/3/131384635/denenefizafuxat.pdf
    • http://files.louatelier.com/uploads/1/3/1/3/131383255/pesada-puwup-nugof.pdf
    • http://files.wilmingtonartcenter.org/uploads/1/3/2/7/132712324/wifevediwar.pdf
    • http://files.kingdomperspectives.net/uploads/1/3/1/3/131379049/304308.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/mivovi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/90243986094.pdf
    • https://cdn.shopify.com/s/files/1/0430/3706/5370/files/35332474030.pdf
    • https://zaxufakizu937564281.files.wordpress.com/2020/07/daputu.pdf
    • https://paxelotabi.files.wordpress.com/2020/07/zefanapejutobas.pdf
    • https://lelulufeg.files.wordpress.com/2020/07/45044168714.pdf
    • https://nizulaxowamo181495606.files.wordpress.com/2020/06/jesevusobapegogem.pdf
    • https://watozidubiba.files.wordpress.com/2020/06/52244210608.pdf
    • https://cdn.shopify.com/s/files/1/0432/4071/8496/files/89458150570.pdf
    • https://cdn.shopify.com/s/files/1/0428/9373/8143/files/575010413.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/wibimunelutuwajutobado.pdf
    • https://cdn.shopify.com/s/files/1/0431/9730/0899/files/74173156041.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/filexesegifaxubiwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6590/9160/files/30313804382.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6279/files/pimekiwupisezunewixuped.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_off0000a0a5.bin
e4e2957bd2162292b58577d88fcd59aa5f50a05ca98310ba889c8f2687684d2a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA0A5 5312 bytes
font_01_sfnt_off0000b27a.bin
d772817c3a7cdad7bf2ebe3ef4da6546d8da9cfe43ee4218c22c69110faabc53
pdf-font-stream PDF embedded font (sfnt) at offset 0xB27A 10892 bytes