Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce18787437a6a6e…

MALICIOUS

PDF

35.3 KB Created: 2020-08-14 04:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22f99d6c3bfca1c2d4145388e8baae76 SHA-1: d03f12397bf94c2e506a17f927369c89e3568fc2 SHA-256: 6ce18787437a6a6eb4f07e3f98a48954cf19f86835fc572ff1212bb9ec1f97b1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with the primary redirector identified as 'ttraff.com'. The document body, though partially corrupted, suggests a lure related to 'worksheet answers', indicating a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, supporting the presence of malicious redirector infrastructure.

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=globes+and+hemispheres+worksheet+answers
    • http://files.realviewelectronics.com/uploads/1/3/0/7/130740053/1543863.pdf
    • http://nogogala.thebrooklynbarberacademy.com/uploads/1/3/0/7/130738696/6744635.pdf
    • http://files.cafegratituderecoverystore.com/uploads/1/3/0/7/130740363/lotegomur_zububitoz_nizelemabuj_taxezavaw.pdf
    • http://files.jeaneart.com/uploads/1/3/0/9/130969879/3b2e74c4.pdf
    • http://vemol.jiarencafe.com/uploads/1/3/1/8/131856408/418ed5269b398.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8990/3264/files/13650528759.pdf
    • https://cdn.shopify.com/s/files/1/0436/1686/2371/files/nupurajitovot.pdf
    • https://cdn.shopify.com/s/files/1/0433/2496/5019/files/1999_mercedes_ml320.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/kowijodipifup.pdf
    • https://cdn.shopify.com/s/files/1/0433/5396/4712/files/72522273232.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/auditoria_interna_integral_administrativa_operacional_y_financiera.pdf
    • https://cdn.shopify.com/s/files/1/0430/2431/8618/files/the_abc_murders_agatha_christie.pdf
    • https://cdn.shopify.com/s/files/1/0428/6208/4262/files/52200282627.pdf
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/50737940144.pdf
    • https://cdn.shopify.com/s/files/1/0433/0310/8768/files/6056547880.pdf
    • https://cdn.shopify.com/s/files/1/0447/0842/9977/files/chemistry_grade_12_nelson_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0450/9263/4789/files/begin_the_beguine_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0437/8329/1029/files/candle_making_books.pdf
    • https://cdn.shopify.com/s/files/1/0429/3492/7513/files/lakebelexusenovazunido.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_off000049bf.bin
56f27fb541883ace489840b5b2d42fe717b798907a1acbec057f375c309dc03c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49BF 5524 bytes
font_01_sfnt_off00005c62.bin
88e76978b8276807101dbb6b5647cc119aa7bbe3a4ea23ce5bfc234c782a2bc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C62 10068 bytes

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