Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60dc8f78ba00e7c…

MALICIOUS

PDF

50.3 KB Created: 2020-08-01 19:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f67b1a3d98bed85259628e0f8fdd4a6 SHA-1: 31dd8d1c3763e575e2259978563e6838e39f9d74 SHA-256: e60dc8f78ba00e7c46e7f296005e921394f3cabd888f3b0db4726a11d8bc7132
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK indicating a link to ttraff.ru, a known malicious redirector. The document body, though partially garbled, contains the text 'Comparative financial statements', suggesting a lure to trick users into clicking the malicious links. The PDF_SEO_LINK_FARM heuristic indicates a large number of external PDF links, many hosted on Shopify, which are likely part of a link farm to improve search engine ranking for malicious content. The primary malicious IOC is the redirector URL.

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=comparative+financial+statements
    • http://files.fultonfalcons.com/uploads/1/3/0/7/130740213/ed1c55.pdf
    • http://files.annbeurdesign.com/uploads/1/3/1/4/131454109/buvedezoxut-bagisepifa-pifefamamatuw-fatematomopoz.pdf
    • http://files.motodesigncafe.com/uploads/1/3/0/7/130775435/zinimerijises-renabolipunu-lajiwimojupur.pdf
    • https://cdn.shopify.com/s/files/1/0429/1713/4499/files/83030990813.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0857/3085/files/67868009310.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2097/files/40234900374.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/81302298061.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3637/files/fekufaravupusogudotetobo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8170/3319/files/69891712779.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/mumox.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/82230962515.pdf
    • https://cdn.shopify.com/s/files/1/0429/6962/8828/files/55374639973.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/tesatudakesu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1818/1013/files/berixajaxipirenozov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gizuvesadumewagetikuxumut.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070a7.bin
aa1dbb9dd546dd2115251d01d99627098c59e2e4e4a63dfbe1eb10202b1139df
pdf-font-stream PDF embedded font (sfnt) at offset 0x70A7 5032 bytes
font_01_sfnt_off000081a7.bin
2e3eca0f0d3ead810e4f2f9c5de6a8dde68628ca86ac2d9058f374116e05022c
pdf-font-stream PDF embedded font (sfnt) at offset 0x81A7 14292 bytes
font_02_sfnt_off0000ae19.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE19 4324 bytes