Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba8e94ec7d39cb1…

MALICIOUS

PDF

48.5 KB Created: 2020-08-06 18:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a569082c1604425444327e2ff9dc621b SHA-1: 078bf865ce331ed9483451de61972ea13946f32f SHA-256: 8ba8e94ec7d39cb11781be72211abd1be81183b2e52e5ae174322e1051160245
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL, https://ttraff.com/pify?keyword=solving+equations+with+fractions+and+decimals+worksheet+pdf, is used to redirect users. The document body, though heavily obfuscated, contains references to this URL and numerous other benign-looking URLs hosted on shopify.com and other domains, forming a link farm. This indicates a likely attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=solving+equations+with+fractions+and+decimals+worksheet+pdf
    • http://wifoki.chcslonline.org/uploads/1/3/2/8/132815028/nalegi_gavovov_jipipeladokuw_rojuba.pdf
    • http://files.dursleymalechoir.org.uk/uploads/1/3/1/3/131384718/zademijijiz.pdf
    • http://files.smart-homesolutionsllc.com/uploads/1/3/2/7/132712120/9570458.pdf
    • http://files.inwed.org.uk/uploads/1/3/2/6/132695525/7b6407d8cf3.pdf
    • https://cdn.shopify.com/s/files/1/0431/7629/6614/files/suzuki_an_125hk_2013.pdf
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/11260817579.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48054684450.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/6041871159.pdf
    • https://cdn.shopify.com/s/files/1/0433/2018/0894/files/fefitajolubibukulema.pdf
    • https://cdn.shopify.com/s/files/1/0428/6382/0959/files/48770632990.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22945880436.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/lezikewisemepibosowitekeb.pdf
    • https://cdn.shopify.com/s/files/1/0436/9684/9051/files/xanimopajojofukolubi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0809/7445/files/45842632985.pdf
    • https://cdn.shopify.com/s/files/1/0434/6760/4128/files/wumibudiwagomil.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_off0000670b.bin
a4bffae5ffd1e556ae19b27152440d51ba4a597bd41d2c90e2b50d560247faa0
pdf-font-stream PDF embedded font (sfnt) at offset 0x670B 5896 bytes
font_01_sfnt_off00007afd.bin
2d84012305b917e0b2cb66433d5d39a828d8097cc540b0d1b73743a558fb7558
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFD 13524 bytes
font_02_sfnt_off0000a68e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xA68E 4324 bytes