Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec160bb0b12c56a…

MALICIOUS

PDF

42.5 KB Created: 2020-08-25 00:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f04c7a1203919fcf07a8c982156bf5b5 SHA-1: dfa4919507b5cde56fb2336d2922328887865fe3 SHA-256: 0ec160bb0b12c56aca476b2314987e002c370e9513ae048cc6fc7db2cd95d41f
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic identifying it as a redirector and link farm. The primary URL, 'https://ttraff.com/pify?keyword=spatial+point+pattern+analysis+pdf', is flagged as malicious, indicating an attempt to direct users to harmful content. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score further support the malicious classification.

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=spatial+point+pattern+analysis+pdf
    • http://gafudi.plantpartners.org/uploads/1/3/0/9/130969757/lokofunuvozovukerin.pdf
    • http://poxesono.glennorion.com/uploads/1/3/2/8/132814930/38d8315b9.pdf
    • http://files.katherinechwazik.com/uploads/1/3/1/4/131437513/a11c866840405d7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0449/9347/8814/files/spatial_reasoning_test_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0461/7489/6281/files/ignou_assignment_submission_slip.pdf
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/informal_alliance_synonyms.pdf
    • https://cdn.shopify.com/s/files/1/0448/1885/8146/files/peter_pan_cuento_corto_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0444/6031/0695/files/web_page_development_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0437/3587/5745/files/salow.pdf
    • https://cdn.shopify.com/s/files/1/0439/4660/6760/files/37675544121.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0729/files/11675789787.pdf
    • https://cdn.shopify.com/s/files/1/0435/4460/8920/files/anandi_vastu_book_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9675/1771/files/comma_or_semicolon_worksheet_answers.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_off000067cb.bin
28d248a36017e7fd5bd9510e483924f38b2a87cead7aa69314e26642b396bff7
pdf-font-stream PDF embedded font (sfnt) at offset 0x67CB 5240 bytes
font_01_sfnt_off000079a0.bin
30ddeac919ded3c5cc00fa200d12f584987ae7577bc3b1fe609e12843f853818
pdf-font-stream PDF embedded font (sfnt) at offset 0x79A0 10336 bytes