Malicious PDF — malware analysis report

Static analysis result for SHA-256 01565f03790631d9…

MALICIOUS

PDF

34.6 KB Created: 2020-08-23 02:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1418e01df097a74edb8d601f182600d2 SHA-1: bdafd8cc2ba76112f5b29a6d23bde33b2cb399ff SHA-256: 01565f03790631d911aa841387410e94b7286456e6a5a9f918fe5e034cd193d0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a known malicious redirector. The primary malicious URL, 'https://ttraff.com/pify?keyword=mother%2527+s+day+acrostic+poems+worksheets', is disguised within content that appears to be related to Mother's Day worksheets. This suggests a social engineering lure to trick users into clicking malicious links. No scripts were extracted, but the PDF structure and embedded links are sufficient to determine the attack pattern.

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=mother%2527+s+day+acrostic+poems+worksheets
    • http://files.hezlettps.com/uploads/1/3/0/9/130969548/jogimugogat-latabotepase-zeleroxexux.pdf
    • http://tidifi.stearnsturns.com/uploads/1/3/2/6/132696483/9006944.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9592/4637/files/c_yield_return.pdf
    • https://cdn.shopify.com/s/files/1/0439/6023/8238/files/bio_data_sample_format_for_marriage.pdf
    • https://cdn.shopify.com/s/files/1/0431/6430/3522/files/90926814514.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/59794681963.pdf
    • https://cdn.shopify.com/s/files/1/0429/8869/9802/files/mimutebivasano.pdf
    • https://cdn.shopify.com/s/files/1/0435/7816/3359/files/psychometric_test_numerical_practice.pdf
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/definition_of_sustainable_supply_chain_management.pdf
    • https://cdn.shopify.com/s/files/1/0435/4772/1882/files/42351490976.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/bigagexetawof.pdf
    • https://cdn.shopify.com/s/files/1/0438/6367/0944/files/84994058831.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6580/files/vobazexukedimagijifalubop.pdf
    • https://cdn.shopify.com/s/files/1/0437/5399/6442/files/manhattan_gmat_books.pdf
    • https://cdn.shopify.com/s/files/1/0434/1966/4541/files/edit_text_in_acrobat_reader_dc.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047df.bin
b5a955b3a1090c29b9af42f6cb35227e063e57fefbfa1fa3256e7fc444285acf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47DF 5580 bytes
font_01_sfnt_off00005ae0.bin
4f266ea5639e6af6c125ec49319298d5b293df4214d4c621513df1598152e01b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE0 10128 bytes

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