Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9b145783a4d279…

MALICIOUS

PDF

44.6 KB Created: 2020-08-20 09:38:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8ab58a9bd1fc3133ee6320bc4dfcfd2 SHA-1: 9d84c7082eababd9c8ad0d1c369815a535e1525a SHA-256: ce9b145783a4d279f673b5c3ce4e82d0cd9d89b50d212bcd57c59d7115cedf2b
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, which is a common lure for phishing or malware delivery. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the primary URL. The PDF_SEO_LINK_FARM heuristic indicates the document is part of a larger link farm, likely for SEO poisoning or distributing malicious content. The embedded URL points to a redirector that likely leads to further 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.ru/pify?keyword=filipino+reading+comprehension+worksheets+for+grade+5
    • http://files.colstripschoolsdigital.org/uploads/1/3/0/7/130739524/2507646.pdf
    • http://files.thewell-seasonedwoman.com/uploads/1/3/0/8/130814535/sitiguzaliju.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0912/files/gebakevokuluno.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/26361687098.pdf
    • https://cdn.shopify.com/s/files/1/0452/0207/9893/files/72943613421.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6582/files/pathophysiology_of_meningitis.pdf
    • https://cdn.shopify.com/s/files/1/0436/1512/5661/files/xekorumolovitoraf.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/42091047896.pdf
    • https://cdn.shopify.com/s/files/1/0432/5035/2296/files/monte_carlo_methods_in_ab_initio_quantum_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0428/7696/0924/files/legend_of_grimrock_2_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/7192/9496/files/4712399051.pdf
    • https://cdn.shopify.com/s/files/1/0434/2392/4376/files/fuwugemenimedolokoziv.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7310/files/zubimiluboruwumipuzufube.pdf
    • https://cdn.shopify.com/s/files/1/0435/6246/7489/files/11352256028.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/54457834293.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_off000061b0.bin
4912d0f93235e85c37bc9f3a357b0328ab6380c36a0df92e1554c133a7351a2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x61B0 5592 bytes
font_01_sfnt_off00007496.bin
8f1aeb4f1b042cba1af16a475c94d4f9af875d2bf6222364b66c61be4a328ec3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7496 10096 bytes
font_02_sfnt_off00009730.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9730 4324 bytes