Malicious PDF — malware analysis report

Static analysis result for SHA-256 000c748ff92ff8d8…

MALICIOUS

PDF

56.0 KB Created: 2020-09-01 17:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b393b95ca67f4d0b26e2f6581654dd7 SHA-1: 96b50b7cdc89460cba02847efa249d1e76e25699 SHA-256: 000c748ff92ff8d8c547e47126f5e4134c9c3fd102417be778193b481f8b1295
194 Risk Score

Malware Insights

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

The PDF document contains a lure related to a US visa application, directing users to click on a link. This link, 'https://ttraff.link/wix?keyword=application+form+for+us+visa+from+canada', is flagged as a malicious redirector. The presence of 'powershell.pdf' in the document text and the ML classifier's high confidence score further indicate malicious intent, likely to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.link/wix?keyword=application+form+for+us+visa+from+canada
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b7306e_45a7260e86b3496d870f285d1feddb07.pdf
    • https://static.usrfiles.com/ugd/599026_3e5e920d40b244beb454c6669f928d1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_8089be3df47d4945b5b6ba07f7465d95.pdf
    • https://static.usrfiles.com/ugd/895bef_69624c39b1784fb0a265708f829fc658.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_ad13fda50c39473e9f21d931554646e5.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34680977850.pdf
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/sebefolamewaxaxozej.pdf
    • https://cdn.shopify.com/s/files/1/0436/4288/0160/files/zidujumidugufum.pdf
    • https://cdn.shopify.com/s/files/1/0430/8136/7712/files/how_to_delete_a_line_in_powershell.pdf
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/handwritten_notes_for_class_12_chemistry_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0439/5125/9803/files/nuvuzudogalufi.pdf
    • https://cdn.shopify.com/s/files/1/0459/7157/0855/files/altus_ok_crime_report.pdf
    • https://cdn.shopify.com/s/files/1/0462/2863/5797/files/jenuvu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7244/4823/files/58675917476.pdf
    • https://cdn.shopify.com/s/files/1/0448/1276/3298/files/custom_sonic_sprites.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/581871399.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/1/0430/5669/3
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009097.bin
3bcc972732cb98da044fbb135a3ae962e93b5a763cf2eb6ec43d47db8a916273		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9097 5116 bytes
font_01_sfnt_off0000a1d4.bin
7e9baaa2ed5290e973a936e2dea269a598688cdf7cf346f5de0088613296a856		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D4 10124 bytes
font_02_sfnt_off0000c46b.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC46B 4324 bytes

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