Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabc366202dcdec6…

MALICIOUS

PDF

47.7 KB Created: 2020-08-22 00:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c5c1a8f5097899924290de046ed20f1 SHA-1: e803d25537ecae2edb2c5c1d21181c97a86d13db SHA-256: fabc366202dcdec66b0cb1ccb2ff9914034ea532c029fc0b0c7778d1c95cc3a2
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'aba english premium apk ultima version' and the malicious URL 'https://ttraff.cc/pify?keyword=aba+english+premium+apk+ultima+version'. This suggests the PDF is designed to trick users into clicking the malicious link, likely leading to malware download or a phishing page. 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=aba+english+premium+apk+ultima+version
    • http://files.blanknersteam.com/uploads/1/3/0/8/130874213/modokewifipimat.pdf
    • http://zovolege.gumcpreschool.org/uploads/1/3/1/6/131637354/aba94a1347.pdf
    • http://poxew.thebiocompatibledifference.com/uploads/1/3/0/8/130873826/9556734.pdf
    • http://files.northwood-ptsa.org/uploads/1/3/2/3/132302941/36d2aa5a25.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/2149975643.pdf
    • https://cdn.shopify.com/s/files/1/0446/8106/8697/files/characterization_in_1984_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/rationale_zahlen_regeln.pdf
    • https://cdn.shopify.com/s/files/1/0437/2001/6021/files/75180727564.pdf
    • https://cdn.shopify.com/s/files/1/0436/8806/7225/files/fowiteraled.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vatajimawi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/alignment_chart_template_meme.pdf
    • https://cdn.shopify.com/s/files/1/0431/7370/7925/files/8635936107.pdf
    • https://cdn.shopify.com/s/files/1/0433/0582/8520/files/55840625308.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/savowogofoxifonikili.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006615.bin
ffda6a01d45f95318c622d7e7415ecd1ba47b93d5749de05de44c7b5e2c2b45e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6615 5484 bytes
font_01_sfnt_off00007899.bin
609e20241fc85c0336590a824c7d0419d8868c3504e2b06b1c4a918c0af1716d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7899 10456 bytes
font_02_sfnt_off00009c7b.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C7B 16092 bytes

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