Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b1cc398f605796…

MALICIOUS

PDF

45.9 KB Created: 2020-08-03 03:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab7cfc4dc123f248e610649d8d7be3ae SHA-1: 2886b2acb720c16cd08ee85cbdcbca9214603fc5 SHA-256: 64b1cc398f6057961994e3d4a5378e772c6866c8a9e27f5bfa710fa2f85012b0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though partially obfuscated, contains the URL 'https://ttraff.com/pify?keyword=biconditional+statement+examples', which is also flagged as a malicious redirector. This suggests the document is designed to lead users to malicious sites, likely for phishing or malware distribution.

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=biconditional+statement+examples
    • http://files.microbesbymarco.com/uploads/1/3/0/7/130775434/lobodojonowalazib.pdf
    • http://files.killingfieldsterrain.com/uploads/1/3/1/3/131381976/kifawi-niridukexizo-fubavajorapitor.pdf
    • http://files.applebypropertymanagement.com/uploads/1/3/1/4/131454355/b4b32c97f.pdf
    • http://files.oldhamcountypolice.com/uploads/1/3/0/8/130814666/6470208.pdf
    • http://files.iveymission.org/uploads/1/3/0/8/130813821/46f98d03eaa1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5249/9098/files/pipovawitoroba.pdf
    • https://cdn.shopify.com/s/files/1/0435/3366/4408/files/74488336168.pdf
    • https://cdn.shopify.com/s/files/1/0429/9227/1519/files/tekimesoduvadutof.pdf
    • https://cdn.shopify.com/s/files/1/0437/5173/5448/files/sipubedefujuberawozuwubu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/2718501981.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vebamuwonodivori.pdf
    • https://cdn.shopify.com/s/files/1/0436/0945/6803/files/tutowuminozitafex.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/tuwuvux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78046530146.pdf
    • https://cdn.shopify.com/s/files/1/0429/3502/5831/files/40487481871.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/60864231117.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c3d.bin
1526f1c4da52a47d1f792bfb074e2951fe383613578814f0bdf05156a2eb7f23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3D 5240 bytes
font_01_sfnt_off00007e05.bin
1685abf7e64c439f00384b505032fac1e30f3a7ad1949437b9d19b0eae01eebc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E05 14488 bytes

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