Malicious PDF — malware analysis report

Static analysis result for SHA-256 8653e6ed2df754ea…

MALICIOUS

PDF

35.1 KB Created: 2020-08-10 15:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fef68ef7868d17b6c4c15c6c3e68e4c5 SHA-1: 17132bcb65e03ca0452c39cb1dfaf2d0fd8cae52 SHA-256: 8653e6ed2df754ea83e50ffb96e722a63e02f8593ad6e85fe4fb2cea65baf3fb
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search results for educational materials, directing users to a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=cambridge+primary+science+stage+2+learner+s+book+pdf. This technique is commonly used for phishing or distributing further malware. No scripts were extracted from this sample.

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=cambridge+primary+science+stage+2+learner+s+book+pdf
    • http://files.nomadesgourmandes.com/uploads/1/3/1/4/131482939/5882482.pdf
    • http://files.annasofiestensgaard.com/uploads/1/3/1/3/131380511/sikem_givofe_nipunubuxevu.pdf
    • http://files.makinglandscapes.net/uploads/1/3/1/3/131379231/kufelivaw-liwip-kulivo-mozajamipomibab.pdf
    • https://cdn.shopify.com/s/files/1/0434/3971/8552/files/12207265185.pdf
    • https://cdn.shopify.com/s/files/1/0437/9587/3949/files/mmpi-_2.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/loradugowuwifasi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9262/1978/files/zegimofezodedurofasasi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0274/9347/files/macbeth_graphic_novel_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/5015/3622/files/7706612111.pdf
    • https://cdn.shopify.com/s/files/1/0429/1290/7427/files/97863370907.pdf
    • https://cdn.shopify.com/s/files/1/0440/6876/5848/files/nejasikegiborodalekanu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.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_off0000409e.bin
8821611b8da64dd361f83758d447ff8ade217246c0e2e370c05c0f88a1f180f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x409E 5724 bytes
font_01_sfnt_off0000540c.bin
ed0cfa95cc543b7cc7955bb9eec136b22443e9a8da07823feae7f9ecbcb6adbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x540C 8608 bytes
font_02_sfnt_off0000714e.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x714E 4324 bytes

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