Malicious PDF — malware analysis report

Static analysis result for SHA-256 047f20e198ffbc1a…

MALICIOUS

PDF

50.3 KB Created: 2020-08-10 17:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62d7f3818d8bf168ae27bf299db810b2 SHA-1: cc3b8c6c39b8b4010bfeb317c645d38966a4984d SHA-256: 047f20e198ffbc1a1bdcd5e9b43db4e987efced716c0ac86d4999840889f7bf9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains text suggesting it is a 'sample student autobiography', a common lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the true destination and potentially manipulate search engine results.

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.com/pify?keyword=sample+student+autobiography+pdf
    • http://files.abbypotter.com/uploads/1/3/1/6/131636941/barepopejasibexebu.pdf
    • http://files.lemonbalmchronicles.com/uploads/1/3/0/7/130775373/rubexibigoxames-xejatom.pdf
    • http://narowod.dianacarterwriter.com/uploads/1/3/1/3/131398020/119927a34e.pdf
    • http://files.pwknives.com/uploads/1/3/0/7/130738805/kemoxut-repum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1977/8723/files/11527879307.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4935/files/10_class_maths_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/nurifujipesexame.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1326/files/accounting_ledger_format.pdf
    • https://cdn.shopify.com/s/files/1/0430/4565/0586/files/dukara.pdf
    • https://cdn.shopify.com/s/files/1/0434/2058/2050/files/31341523366.pdf
    • https://cdn.shopify.com/s/files/1/0446/4757/9811/files/makalah_cacar_air.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/3557587286.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/pimejobekesabedenexuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/5489/0149/files/lixobi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/waxexadasumof.pdf
    • https://cdn.shopify.com/s/files/1/0432/2151/6448/files/algebra_quiz_grade_9.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000765b.bin
18f4960a52d64bc83d6c304eee4b25c9ca37eec54c0f4efd5701b5568bea1fd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765B 6568 bytes
font_01_sfnt_off000086aa.bin
a520fd323901489c7be01149d8d35cfa427c34a84ff2f10166d4592ae78a338c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86AA 5800 bytes
font_02_sfnt_off00009a36.bin
b5cd63be604aada8c5bd794fe9c3e5ae28776a9aad8a789709959c46a58cca43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A36 9880 bytes

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