Malicious PDF — malware analysis report

Static analysis result for SHA-256 66dde27f8c90bc91…

MALICIOUS

PDF

63.3 KB Created: 2020-08-17 04:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afef15d7d2245d8f086410f6ee8374bf SHA-1: 29fa26abcfc3838205f7f36ed974f7171e5723ba SHA-256: 66dde27f8c90bc91209c8918e50d44aa42c264be358a7ff409e1f89c1219f06b
154 Risk Score

Malware Insights

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

The PDF document contains embedded links designed to redirect users to malicious infrastructure, specifically identified by the URL https://ttraff.com/pify?keyword=hssc+exam+date+sheet+2019. The document body, though partially obfuscated, appears to be a lure related to an exam date sheet, aiming to trick users into clicking the malicious link. The presence of numerous external PDF links further supports the classification as a link farm, likely intended to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=hssc+exam+date+sheet+2019
    • http://files.ebcmasonry.com/uploads/1/3/0/7/130739704/bde55.pdf
    • http://files.buttonwoodheights.com/uploads/1/3/0/7/130740033/tufojujewudixaf.pdf
    • http://files.wayne-badminton.com/uploads/1/3/1/3/131384359/9068208.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/59854993546.pdf
    • https://cdn.shopify.com/s/files/1/0432/7391/2488/files/68424240574.pdf
    • https://cdn.shopify.com/s/files/1/0435/6915/2163/files/javascript_iterate_over_object.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/bigim.pdf
    • https://cdn.shopify.com/s/files/1/0437/5969/8077/files/88756094437.pdf
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/theory_of_point_estimation_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/6666/8694/files/90204736019.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54101174921.pdf
    • https://cdn.shopify.com/s/files/1/0429/9443/4207/files/complex_numbers_formulas_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0437/5114/5626/files/72113012600.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063ab.bin
2e2470cea0916b512470ab0d2a91241a7e49da6fb7325b1ef2cf0db58b9bfc83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63AB 5088 bytes
font_01_sfnt_off000074f2.bin
b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F2 3720 bytes
font_02_sfnt_off0000804d.bin
7420db9ec41012b263dff8e0d039d2a895961a6b4c1647eabbcd20f441fad98a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x804D 1936 bytes
font_03_sfnt_off00008994.bin
0e0e9dc9bc29e73cf6dd550a70a2c6b1852181cb0fe7f440d3b24cc34b91f5c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8994 10788 bytes
font_04_sfnt_off0000aeb6.bin
032413062597e5393dd34b29a3f0a7561840314150b3ef94e38aeb0f1ded41b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB6 16476 bytes
font_05_sfnt_off0000c503.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC503 4324 bytes
font_06_sfnt_off0000d305.bin
48200ec0dfc61dcf1070c2608e7895875c58457ed27a76f2da6b3af13f4cfaf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD305 8332 bytes

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