Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d4e2713e24d446d…

MALICIOUS

PDF

42.1 KB Created: 2020-08-22 11:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab515c22564f708dc988a0c188265c09 SHA-1: 40cc4a3117eb3e7cd118638dc10c17ae13bef9ff SHA-256: 7d4e2713e24d446d7adff0501a164f3b16615ff169d3ddc6d1fa74bc2162f5c9
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector at 'https://ttraff.com/pify?keyword=een+informele+brief+schrijven+in+het+engels'. Another critical heuristic identified a PDF link farm, suggesting an attempt to manipulate search engine results or distribute multiple malicious files. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains text related to writing an informal letter in English, likely a lure.

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=een+informele+brief+schrijven+in+het+engels
    • http://files.jackiesedlock.com/uploads/1/3/2/7/132740598/wagurewuvefudosufo.pdf
    • http://wekapinuj.georgiacrook.co.uk/uploads/1/3/1/6/131636954/fimuk_tibidofogo_bakagir.pdf
    • http://files.teapartypatriotplace.com/uploads/1/3/1/8/131856173/d8d132254f.pdf
    • http://files.mindfulprograms.com/uploads/1/3/1/4/131453111/4577458.pdf
    • http://pupudoxep.reimaginepossibilities.com/uploads/1/3/0/7/130775934/9798518.pdf
    • https://cdn.shopify.com/s/files/1/0429/3663/1452/files/dulorufijini.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/yasin_dan_tahlil_latin.pdf
    • https://cdn.shopify.com/s/files/1/0430/3064/2837/files/rotededoxek.pdf
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/converting_metric_units_length_sheet_1_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8453/files/english_guide_for_class_9_kpk.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7248/files/38487972765.pdf
    • https://cdn.shopify.com/s/files/1/0432/8230/1094/files/alter_ego_a2.pdf
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/bipapudopitela.pdf
    • https://cdn.shopify.com/s/files/1/0434/4761/5649/files/59102698479.pdf
    • https://cdn.shopify.com/s/files/1/0434/3437/7372/files/r_rename_column.pdf
    • https://cdn.shopify.com/s/files/1/0441/0372/9304/files/7438845627.pdf
    • https://cdn.shopify.com/s/files/1/0432/4887/7736/files/88779828982.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_off0000652c.bin
a87330e24937d55019b65481fb4923a626d049f3d4265e62d645f80a3ce807b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x652C 5316 bytes
font_01_sfnt_off0000772d.bin
b5d3a0bb67eadd04942e842d518b72e8d66ff3befe9f0029a3d87bc2dd31cc3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x772D 10816 bytes