Malicious PDF — malware analysis report

Static analysis result for SHA-256 da77566c0d60d77d…

MALICIOUS

PDF

41.8 KB Created: 2020-08-18 20:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46ebdf5b00a02590a0f1881ccab1829d SHA-1: 7e957015352637966e8faee8bd55235f6af8b8b1 SHA-256: da77566c0d60d77d6c3774e974cfc144d0ea08d3b45f027f740a5b0eabba42a7
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=b.+ed+scholarship+form+online+last+date'. This indicates the document's primary purpose is to redirect users to potentially harmful content. Additionally, a heuristic for a PDF link farm was triggered, with numerous external links, many hosted on Shopify. While some Shopify links are confirmed benign, the presence of the malicious redirector suggests a phishing or malware distribution attempt.

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.cc/pify?keyword=b.+ed+scholarship+form+online+last+date
    • http://sokuba.thewellnesstraininginstitute.com/uploads/1/3/1/6/131606617/rebuzajewira.pdf
    • http://files.livingdemocracy.info/uploads/1/3/2/8/132814071/5549987.pdf
    • http://files.wao-lb.com/uploads/1/3/1/3/131379356/9642608.pdf
    • http://files.m2students.net/uploads/1/3/1/4/131407469/rilef_niwevugugifadev.pdf
    • https://cdn.shopify.com/s/files/1/0434/7153/6285/files/bulajarezonutobomolo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1813/3405/files/l_honntet_radicale.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6320/files/buzejorokutozanaj.pdf
    • https://cdn.shopify.com/s/files/1/0440/6909/3541/files/reddit_com_hearthstone.pdf
    • https://cdn.shopify.com/s/files/1/0428/2882/4742/files/lazifumuveb.pdf
    • https://cdn.shopify.com/s/files/1/0429/6923/5619/files/black_dog_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0439/5565/0718/files/bufolo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/lotupe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8921/5129/files/87924763844.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7822/files/quizlet_premium_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0435/8343/9003/files/atex_directive_1999_92_ec.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/basic_guitar_chords_finger_placement.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3876/files/wuvogamababobomeper.pdf
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/22672008533.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_off0000654e.bin
22890167a072ff7bd12864bb16ee66fabb74342e20b7c3e344a311db3d063703
pdf-font-stream PDF embedded font (sfnt) at offset 0x654E 5476 bytes
font_01_sfnt_off000077c6.bin
f59f500916aadcd22498eda32eef19d8fa86a2906ee8ee25a0b9c36595df63d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x77C6 10116 bytes