Malicious PDF — malware analysis report

Static analysis result for SHA-256 d12c5f17b7c825e1…

MALICIOUS

PDF

58.1 KB Created: 2020-09-12 10:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18f0db8047086e70d76a99e654dcb67e SHA-1: 1a81d30a1c178a89c0a79da8e59b2aa60ac1480f SHA-256: d12c5f17b7c825e1fcdfefda640e19dab529b40467851bf40b110426f22f4259
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract traffic. The presence of a malicious redirector and a link farm strongly suggests a phishing or malware distribution attempt.

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.link/wix?keyword=android+mobile+phones+under+6000+range
    • http://gizexa.nepscholarshipfund.com/uploads/1/3/1/3/131379477/8840838.pdf
    • http://files.spiritofawordsmith.com/uploads/1/3/1/3/131379578/kipotorin-gixuwazabaxiso.pdf
    • http://files.yogablackpool.com/uploads/1/3/0/7/130740563/e50d3b8baa.pdf
    • http://files.pollination-project.org/uploads/1/3/0/7/130776877/66a74dcab517e8.pdf
    • http://dures.karuewachiraphotography.com/uploads/1/3/1/1/131163667/nenin-banidirep.pdf
    • https://cdn.shopify.com/s/files/1/0433/6418/8312/files/joxoviteponukadekijalo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/kunug.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/zizavukidujulin.pdf
    • https://static.usrfiles.com/ugd/ce5d00_9c617b6b4f984bb688287d1f5f68bdb5.pdf
    • https://static.usrfiles.com/ugd/67e251_4395395090f54621be456868525e611b.pdf
    • https://static.usrfiles.com/ugd/b91566_7a0d8ab1ebaf4e63a41fdbda253534ca.pdf
    • https://static.usrfiles.com/ugd/6290de_8cd8e7d85f7d4fa8914b3660fa875c3a.pdf
    • https://static.usrfiles.com/ugd/abd6ea_a88a12d8a38c4af5ba2a6019255d594e.pdf
    • https://cdn.shopify.com/s/files/1/0434/3414/7989/files/xumupopiwexavebufe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3984/1695/files/lagu_alhamdulillah_all_praises_to_allah.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_off00008c69.bin
61a56375df8b795695f0848c4853219ba46513007ff34c27b2b9dc833247984e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C69 5800 bytes
font_01_sfnt_off00009fed.bin
d8abc5b44037b0dfc063befff3696b9dd0149622a053d9669e18a107dd175c41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FED 10976 bytes
font_02_sfnt_off0000c5a9.bin
7ec3252b81f7f270858b314c2eed8386446a61743cc451621a2e02bf30326cdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A9 16288 bytes

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