Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f142154c6ac9bf…

MALICIOUS

PDF

53.9 KB Created: 2020-08-19 19:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5918876c26b61426d77a257be604cc7a SHA-1: b1748b79709c992ee558a06100a10d3095f0b7c7 SHA-256: 69f142154c6ac9bf50ca48da4669a45824fcdc7601b7e65761c89a5a12808bbc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm with 26 external PDF links, including a critical redirector link to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'Iti admission form haryana' and the malicious URL, suggesting a phishing or scam lure. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

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.ru/pify?keyword=iti+admission+form+haryana
    • http://fewutano.bigskyadventuretours.com/uploads/1/3/2/6/132696414/454f55a.pdf
    • http://tawogu.prestonsburgchurch.org/uploads/1/3/0/8/130874247/2548071.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5676577217.pdf
    • https://cdn.shopify.com/s/files/1/0433/3751/5176/files/zewisimitetag.pdf
    • https://cdn.shopify.com/s/files/1/0436/0234/6148/files/disadvantages_of_computer_in_business.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0011/files/mofesalejiwezemazawira.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/54099158602.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6720/files/24936330463.pdf
    • https://cdn.shopify.com/s/files/1/0431/5542/3398/files/xirop.pdf
    • https://cdn.shopify.com/s/files/1/0438/2811/7661/files/interpreting_standard_deviation_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/6877/4807/files/70191106542.pdf
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/86458049977.pdf
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/abrsm_piano_scales.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066f4.bin
cda6f65a2b334154be50b63fe253ad2cde695a3d52d27c5cc4f6438f905b9141		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F4 5156 bytes
font_01_sfnt_off0000784b.bin
5e067315a2bd9524b6254977960f062bb129990ed69868068e29b4596197f3c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x784B 2320 bytes
font_02_sfnt_off0000829d.bin
6356f035a4953baf052481b442747034054d777f1de4810f9159460c571893e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x829D 9880 bytes
font_03_sfnt_off0000a4ab.bin
a349519ccbdbca3d75704c2becf615ab37801eb1543272228454131dceb83acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4AB 16224 bytes
font_04_sfnt_off0000ba34.bin
bf05869bdfb2050b3482998dda5de6ac14284f4ef3774120580f43a2dcfe83bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA34 4152 bytes

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