Malicious PDF — malware analysis report

Static analysis result for SHA-256 f36e43706bbee5b3…

MALICIOUS

PDF

35.4 KB Created: 2020-08-03 13:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bc025c8c09870dcca732f5cff884678 SHA-1: 0e2d3ad8ac3046bb9e3e04c96b281f814ffbfaf0 SHA-256: f36e43706bbee5b3b736894b86fe212cff34b6eb87054ed6fde2121fb778dfa4
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as educational material. The document body and heuristics indicate a lure using '10th class maths notes pdf karachi board' to entice clicks. The PDF also hosts a link farm of other PDFs, suggesting a broader SEO poisoning or content spamming operation. 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.com/pify?keyword=10th+class+maths+notes+pdf+karachi+board
    • http://files.nahskeyclub.org/uploads/1/3/1/4/131406181/bedebilafor-rovod-fixuwoxemugisaj-jaxemu.pdf
    • http://files.thelocalalameda.com/uploads/1/3/1/3/131398547/9927896.pdf
    • http://files.voyagexplore.com/uploads/1/3/0/7/130776366/finetilav-fajalativid.pdf
    • https://cdn.shopify.com/s/files/1/0431/1495/4908/files/dezerodome.pdf
    • https://cdn.shopify.com/s/files/1/0432/1368/4891/files/wotulixugetugexakan.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/vuzimavijogigef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8239/files/69342380048.pdf
    • https://cdn.shopify.com/s/files/1/0434/9827/4978/files/jedixudiwivasi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/zalixejil.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/statistics_for_the_life_sciences.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/kenmore_side_by_side_refrigerator_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/lajerutuda.pdf
    • https://cdn.shopify.com/s/files/1/0429/3459/9843/files/fake_address_usa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2017/9864/files/11914531310.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_off00004c88.bin
8609bd5fac04db79049503122f091d725d01af6f950b5338b163b0a6d4ee76df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C88 5696 bytes
font_01_sfnt_off00005fb5.bin
216118359d866178588add4bf4cead3ddea46b6848160b47c70f4910e25a25d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB5 9640 bytes

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