Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32e1988ff655490…

MALICIOUS

PDF

43.8 KB Created: 2020-08-03 22:40:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4a25d4dfeb1fd1a1942da30c425b8cb SHA-1: 27773327e7859bcf575d29be28a9d5e012f4f9c7 SHA-256: b32e1988ff655490f85e3cdb82a7b774dd9ebb433ad9c4513694ae98dae4eca0
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=fusionner+pdf+excel'. This URL is presented within the document body, suggesting a social engineering lure to trick users into clicking it. The presence of numerous other links to PDF files hosted on various domains, including Shopify, indicates a link farm designed to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=fusionner+pdf+excel
    • http://files.maryseaveynhjp.org/uploads/1/3/1/4/131483265/furonojegugidos-zewutovamin-suxazuxomujuk.pdf
    • http://files.explicationcentral.com/uploads/1/3/0/7/130776601/3247034.pdf
    • http://files.cannonurology.com/uploads/1/3/2/7/132710624/rimewexala_bizivub_nafudonigaxi_luxalufonu.pdf
    • http://files.buffaloxa.com/uploads/1/3/1/8/131856160/3887721.pdf
    • http://files.tankuanaw.com/uploads/1/3/1/3/131379612/eda4253071.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/xixizax.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/tebutufivimoxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6204/2532/files/dupumosugeliwabakuvebeli.pdf
    • https://cdn.shopify.com/s/files/1/0432/2410/5124/files/zudomejubetaxenija.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/kapolifaxasefilo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3358/4035/files/62732807221.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/tenekik.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/wesepikezetuwubupawexa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0373/9294/files/16501472002.pdf
    • https://cdn.shopify.com/s/files/1/0436/4818/8569/files/573229113.pdf
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/lutebusavimavob.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6000/files/xbox_one_controller_pc_driver.pdf
    • https://cdn.shopify.com/s/files/1/0436/8721/5269/files/how_to_delete_fortnite.pdf
    • https://cdn.shopify.com/s/files/1/0433/5026/1915/files/unity_2d_jump.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/
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/wesepikezetuwubupaw

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e4f.bin
cfb8956a53d1ef41fcbe07c428f655a100e3cf6c199f333032d2d5914fc12a4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4F 4964 bytes
font_01_sfnt_off00007f4f.bin
a5be79c733ff0acb54de09ade0a2f0d57417218089df1eb76f0a3cba68884319		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4F 10168 bytes

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