Malicious PDF — malware analysis report

Static analysis result for SHA-256 553ba6c18d3468c0…

MALICIOUS

PDF

112.3 KB Created: 2020-08-06 19:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfe81127f6ebe8f7a887d3a6db511221 SHA-1: 2ce8e4c2588213784e536df8ee227c3343caec34 SHA-256: 553ba6c18d3468c0fe849081188755cbd3ed4a9521c8a1deaa032fb3137af6c4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though partially garbled, contains the same URL, suggesting it's the primary lure. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous embedded links, many pointing to Shopify, indicates a link farm strategy, likely to obscure the malicious redirector.

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=lean+six+sigma+black+belt+training+pdf
    • http://files.mosaconcerts.org/uploads/1/3/1/3/131380754/7771862.pdf
    • http://files.renatalindroos.com/uploads/1/3/1/3/131381881/zolus-betuxoxezevoma.pdf
    • http://files.twistedtangerine.com/uploads/1/3/2/6/132682295/a23c91fe5c23.pdf
    • https://cdn.shopify.com/s/files/1/0434/0160/9366/files/ford_ranger_repair_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/3421/4561/files/java_code_games.pdf
    • https://cdn.shopify.com/s/files/1/0429/6212/4959/files/juvukitexonesusegakelib.pdf
    • https://cdn.shopify.com/s/files/1/0434/1848/4888/files/95336361559.pdf
    • https://cdn.shopify.com/s/files/1/0429/8588/1759/files/www_eppicard_nj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5800/4117/files/53547771631.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9784/files/12787783906.pdf
    • https://cdn.shopify.com/s/files/1/0428/8138/4604/files/xajevodad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/turob.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/wojowukuxedovezatekogu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74133662670.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/spell_check_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/benivat.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015d40.bin
44150c53297e8723052834c86d0a2c29fd77831ca9ecb1d4315d249c6a096878		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D40 5688 bytes
font_01_sfnt_off0001708f.bin
c96cbc1dbcb088b1b1878ada143f89ae62942f3ab9998f2a5c619be0c8a18741		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1708F 14696 bytes
font_02_sfnt_off00019f1c.bin
c43c81af3addadc619f1b50b0eb79006c69e58cb90abf43f7a5fbd940e22698c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19F1C 16060 bytes

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