Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba903aa7920f73d…

MALICIOUS

PDF

44.8 KB Created: 2020-07-29 18:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e6f27684aec8f3c646c16fe5810733d SHA-1: 0cfac9f4da086512fadf2fcf7f09c4ea97453310 SHA-256: 1ba903aa7920f73d64f503b1b020bae75ae81c760fd35835620f2aef9c667569
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with at least one pointing to a known malicious redirector (ttraff.cc). The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to be a lure related to PDF bookmarking, likely intended to trick users into clicking the malicious links. The presence of multiple links hosted on various domains, including those that appear to be part of a link farm, further supports a malicious intent to drive traffic to harmful sites.

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=bookmarking+a+pdf+acrobat
    • http://files.hillaryplog.com/uploads/1/3/0/7/130739809/8181e39262f080.pdf
    • http://files.etiennemedard.com/uploads/1/3/1/3/131380063/vaxiwoni-zigen.pdf
    • http://files.anneoregan.com/uploads/1/3/2/7/132710787/kutamu-vumefubogufa-famumobetuwi-zesaxip.pdf
    • http://files.loveharmonyrecords.com/uploads/1/3/1/3/131379324/65049f0d53.pdf
    • http://files.anneoregan.com/uploads/1/3/2/7/132710787/kutamu-vumefubogufa-famumobetuwi-zesax
    • https://cdn.shopify.com/s/files/1/0434/2946/2165/files/notododixuwas.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/dedumenekobunafok.pdf
    • https://cdn.shopify.com/s/files/1/0432/6375/4408/files/tilama.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4456/files/61165584783.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/medanunugopimiba.pdf
    • https://cdn.shopify.com/s/files/1/0434/5053/1990/files/durita.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/29804255066.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/22240636396.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8646/files/kedovuxikijotesewaraje.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0701/files/bafazexi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/7706024118.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/61455629636.pdf
    • https://cdn.shopify.com/s/files/1/0433/6461/4303/files/xorogovobexuvefikotol.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/xiziwisuledete.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_off000071f3.bin
ffa68746cf99e94177489b1d138c03a5820464d364734cb56e784f1f84873b06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F3 5188 bytes
font_01_sfnt_off00008370.bin
33e74f6a432b3b3d9a7309a8a1a4371a7ad9af8bd9da13780eaf0e8c50cf110f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8370 10088 bytes

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