Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb56897115df1c2…

MALICIOUS

PDF

38.1 KB Created: 2020-08-28 04:02:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04ef32a98283d4e054236fafd5e488b0 SHA-1: 8e323c32860eff623f9e2c51273648635a5ce2fa SHA-256: 7fb56897115df1c2a2c886ea1031d6d40647bc78c34dd2b39258219488f3cff3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains text that suggests it is masquerading as an owner's manual to entice users to click the malicious link. The primary malicious URL identified is https://ttraff.club/pify?keyword=suzuki+boulevard+s40+owners+manual+pdf, which is flagged as a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.club/pify?keyword=suzuki+boulevard+s40+owners+manual+pdf
    • http://files.yottaearthhome.com/uploads/1/3/1/4/131437276/nukekafudikuwute.pdf
    • http://files.berkshireheros.org/uploads/1/3/1/0/131070476/4ffe5b7.pdf
    • http://mejuninot.rfhp.gwhwi.org/uploads/1/3/0/8/130813821/wonunupe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/9714/2936/files/3649349613.pdf
    • https://cdn.shopify.com/s/files/1/0428/8705/3471/files/mujofulofuwubeno.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0225/files/24931347403.pdf
    • https://cdn.shopify.com/s/files/1/0440/1197/8902/files/pufidamimafigasokojuwulup.pdf
    • https://cdn.shopify.com/s/files/1/0440/8508/4310/files/gisoremifovonipugewuboguk.pdf
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/xavarexamadika.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/zelilofeverosowomobad.pdf
    • https://cdn.shopify.com/s/files/1/0437/5799/4142/files/algorithms_in_a_nutshell_a_desktop_quick_reference.pdf
    • https://cdn.shopify.com/s/files/1/0429/1965/7628/files/50534015006.pdf
    • https://cdn.shopify.com/s/files/1/0434/6223/0181/files/kulepunusavugax.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/susenonelukagusobalo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xozujegemuzudileruzodedus.pdf
    • https://cdn.shopify.com/s/files/1/0433/3296/0409/files/graphing_lines_in_slope_intercept_form_worksheet.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000553f.bin
3595fa2666207c7c8de6cd0758c2785545dfab0ea0982b49f366d1fa7d8d3809		 pdf-font-stream PDF embedded font (sfnt) at offset 0x553F 5924 bytes
font_01_sfnt_off0000696d.bin
b1672acc49ba0b6d8b8b8d9283957aab8272ec36f56707668fca4bb27fd10f2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x696D 10100 bytes

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