Malicious PDF — malware analysis report

Static analysis result for SHA-256 37217bf2ffb6d084…

MALICIOUS

PDF

41.3 KB Created: 2020-08-12 14:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc82c6ec86a089c62b249dbcc382218f SHA-1: 0fdf70d1eb42e81fff8cd5e4385423725396a929 SHA-256: 37217bf2ffb6d08497505d664c6d396c2d0d84c2df42566f8dfe6c347f775812
152 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links, including one pointing to a known malicious redirector at 'https://ttraff.cc/pify?keyword=absa+premiership+fixture+2020+20+pdf'. This redirector likely leads to a malicious payload or phishing site. The document's content, though obfuscated, appears to be a lure related to a sports fixture, aiming to trick users into clicking the malicious link. The ML classifier strongly supports the malicious nature of this PDF.

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=absa+premiership+fixture+2020+20+pdf
    • http://files.strngrclothingcompany.com/uploads/1/3/1/4/131437017/midajopel.pdf
    • http://files.maverickwellnessboston.com/uploads/1/3/1/4/131454051/8a38c6f2eb6643.pdf
    • http://files.phase1trackclub.com/uploads/1/3/2/6/132681602/2a3a5ab08c0.pdf
    • http://files.grampcity.org/uploads/1/3/0/8/130873715/dopegujeputef.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/xiwezigejipomebil.pdf
    • https://cdn.shopify.com/s/files/1/0427/8140/9436/files/63413311478.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/nesur.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1185/files/terraria_whoopie_cushion.pdf
    • https://cdn.shopify.com/s/files/1/0429/8113/0394/files/60212849891.pdf
    • https://cdn.shopify.com/s/files/1/0428/4694/5436/files/lafajep.pdf
    • https://cdn.shopify.com/s/files/1/0434/7923/6760/files/tesis_de_habitos_alimentarios.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9887/files/65097619870.pdf
    • https://cdn.shopify.com/s/files/1/0440/3511/3110/files/australia_visa_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/2658/6519/files/10312473938.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/against_the_wind_piano_sheet_music.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_off00005958.bin
bf46740865f894c9e05bf7065c6352c4aa1f0b9ce50bb2ee7d5d92d4b8b1b42a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5958 5720 bytes
font_01_sfnt_off00006ca3.bin
aa31690e4aaa98404c07e7435b17493ae834b66249a51380ddde73213ac53032
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA3 14076 bytes