Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5777c3c84d92c45…

MALICIOUS

PDF

47.2 KB Created: 2020-07-25 19:39:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84dfea36174e6f3a9b8d5133fa53707b SHA-1: b42c717eb8a7d54d3d9b66683cd972deb4305c71 SHA-256: a5777c3c84d92c45c32c06107db4a786a6c8efca7372eb915fd227046a91d14c
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, pointing to ttraff.ru. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute content through a link farm. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure.

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=languideci%25C3%25B3+que+significa
    • http://files.lejolijardin.com/uploads/1/3/0/8/130874627/fikepo_kigagofumuv.pdf
    • http://files.brooksidepineriver.com/uploads/1/3/2/8/132814415/e9eb96e8f70431a.pdf
    • http://files.whiterabbitdesigncompany.com/uploads/1/3/0/9/130969051/317ffa71.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/17852003875.pdf
    • https://cdn.shopify.com/s/files/1/0438/0642/5248/files/tajiromexe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49839171509.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/16886219667.pdf
    • https://cdn.shopify.com/s/files/1/0431/8104/7965/files/32525315170.pdf
    • https://cdn.shopify.com/s/files/1/0429/3866/3079/files/weniwisewuja.pdf
    • https://cdn.shopify.com/s/files/1/0437/3485/9941/files/nuximifasofisuboniz.pdf
    • https://cdn.shopify.com/s/files/1/0434/4807/4405/files/56769806892.pdf
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/lofakufekopulene.pdf
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/61825062742.pdf
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/duwudevugimo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/webozavuxobozesupokuk.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_off000078e9.bin
a8ea31d4f3648e16cb92120efff23daffc0279a6d16bab492247f4cd79a6e707		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E9 4956 bytes
font_01_sfnt_off000089cc.bin
6061471c70672f1101382a96eae3322869fae2401eb9eedfce540d5056949e49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89CC 11176 bytes

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