Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0b26da4d4beda7…

MALICIOUS

PDF

52.4 KB Created: 2020-09-01 19:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19d02d7e360c504169b5142615feac0a SHA-1: 292df870616d3f16b5b1ad705fb6822bb2678925 SHA-256: 6e0b26da4d4beda715e469de719e00d86c97fcc1d7978f0440b71cfd06bf3a80
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains the same URL and references a 'guide', suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, points to a link farm strategy to obscure the malicious destination. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.me/wix?keyword=bristleback+guide+dotabuff
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0443/4483/6252/files/dudotuvu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6638/2749/files/quantitative_chemistry_molecular_weight_and_mass_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9652/files/vifujosev.pdf
    • https://cdn.shopify.com/s/files/1/0435/1678/8890/files/22999770229.pdf
    • https://cdn.shopify.com/s/files/1/0429/6799/0438/files/all_of_me_lyrics_and_guitar_chords.pdf
    • https://cdn.shopify.com/s/files/1/0437/1136/5288/files/are_8_track_tapes_worth_anything.pdf
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/54997164700.pdf
    • https://cdn.shopify.com/s/files/1/0434/4109/4812/files/anatomy_of_heart_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/2979/7787/files/24018102728.pdf
    • https://cdn.shopify.com/s/files/1/0432/7954/8580/files/57440127380.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4189/files/divinalifumirabulezufe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/wapubakazu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0438/7750/files/kelab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b44.bin
c00935e357e48c7ecd6d77b9fc59e2793c45c99ba4717ac7c12c6a913796d071		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B44 5444 bytes
font_01_sfnt_off00007dd6.bin
4452dd29ac49a63c1929e99bff7ad62daa979f9a20c06cacfe1583521ae414be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD6 16124 bytes
font_02_sfnt_off0000ad82.bin
5f554add6b47821b59dfbca23f15dd7280348411aadadd3984337ac02f3206c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD82 16124 bytes

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