Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d47526aec7c92e5…

MALICIOUS

PDF

44.2 KB Created: 2020-08-15 04:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e33a3933e6ca159445ec28cdfdde16bf SHA-1: dcd7bd1ae34d9edd284beb83b43eda31e5bd94e4 SHA-256: 2d47526aec7c92e5aa03b10e26695753d8e51481940cc1104aef7e4e817c77ee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.cc. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and several benign-looking PDF filenames, suggesting a lure to disguise the malicious intent. The primary attack pattern involves redirecting the user to malicious infrastructure.

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.cc/pify?keyword=filmmaker+the+love+market
    • http://lokopim.scrappersdelights.co.uk/uploads/1/3/0/9/130969440/kagaxazotamun_zilikivopiz_rurigev_zadegamebojeji.pdf
    • http://files.riokeyclub.org/uploads/1/3/1/3/131380138/risofakiw.pdf
    • http://files.greencountrymg.com/uploads/1/3/1/4/131437504/mevowazij.pdf
    • http://files.zumbrotadancestudio.com/uploads/1/3/0/9/130969855/6072427.pdf
    • https://cdn.shopify.com/s/files/1/0440/2960/8101/files/23394021259.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/64903634590.pdf
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/secured_unlock_adobe_acrobat.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/ryzen_3000_undervolting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/princeton_review_gre_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/masezawoxijoturuviv.pdf
    • https://cdn.shopify.com/s/files/1/0440/5736/2597/files/vodugezogujolazu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/7741402683.pdf
    • https://cdn.shopify.com/s/files/1/0433/2886/4409/files/nafiwilaviweribuvitadutav.pdf
    • https://cdn.shopify.com/s/files/1/0438/2385/7824/files/rusaxebimikupalol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27150836515.pdf
    • https://cdn.shopify.com/s/files/1/0438/3126/3394/files/34841914942.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96672573922.pdf
    • https://cdn.shopify.com/s/files/1/0431/7986/8309/files/cateter_venoso_central_tipos.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_off00006635.bin
670cdbc8d5dbab43b95aba319fff2b67f288839833291df48d3d1fb2493da31e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6635 4824 bytes
font_01_sfnt_off00007674.bin
49ea22d2c68951056c51b03ab48861f238dfe729506ec70d54210a488d6969c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7674 14444 bytes

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