Malicious PDF — malware analysis report

Static analysis result for SHA-256 616eda43ee2c03ca…

MALICIOUS

PDF

73.3 KB Created: 2020-08-18 13:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96dc3de3408a6be34ab9ff04e5fcf8c5 SHA-1: e010c4070abebd309ba93c0452510c841820a25e SHA-256: 616eda43ee2c03cae9e76d92f3c4cf4f4d8f905d4037c2d1c96acf6d3b77d835
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as academic notes. It also exhibits characteristics of a link farm, with numerous embedded links to various PDF files, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=bsc+zoology+notes+second+year+pdf
    • http://files.threebridgesboutique.com/uploads/1/3/1/3/131380126/5e38200c4d25.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0447/7979/8679/files/actuarial_science_financial_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0434/2192/5525/files/jesus_in_la_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/5656/1318/files/52142893483.pdf
    • https://cdn.shopify.com/s/files/1/0428/7637/1110/files/jezesitukiletuwawat.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/makalah_persamaan_dasar_akuntansi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8924/5861/files/tapovegiveperizetijanub.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1513/files/sapupidaduxelifaze.pdf
    • https://cdn.shopify.com/s/files/1/0429/6110/9155/files/biduwaregurowizemifoju.pdf
    • https://cdn.shopify.com/s/files/1/0429/5029/5708/files/dark_souls_2_human_effigy.pdf
    • https://cdn.shopify.com/s/files/1/0429/3158/5180/files/mufikomob.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/wetadinugiguba.pdf
    • https://cdn.shopify.com/s/files/1/0429/8381/7375/files/pedivosorad.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a9d8.bin
dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9D8 2828 bytes
font_01_sfnt_off0000b3d2.bin
ed4cd3b2b69740fcac39f809dea00d897b1546195c3dadcba12b5497c70c43cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D2 5524 bytes
font_02_sfnt_off0000c6af.bin
55deeea3a93518db721a97da0d8f9359fab86ec4add728a48e55287c41c27800		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AF 3204 bytes
font_03_sfnt_off0000d39f.bin
7bb91423d63eb6bd7c2657278979848d60b7d38679106ec23dbd755ba6ab3d32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD39F 2320 bytes
font_04_sfnt_off0000ddef.bin
6111f1320814c5d613dd7f38811c7983f64699f0be94e901e7d9e8be6fdb308d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEF 10372 bytes
font_05_sfnt_off0001016a.bin
5f3bf50395e8d1b65f29ab90a426c3665da69f8437ae50e88eef237d5e22552a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1016A 16224 bytes

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