Malicious PDF — malware analysis report

Static analysis result for SHA-256 15a663e175d32e00…

MALICIOUS

PDF

43.2 KB Created: 2020-08-19 07:39:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f91ac3b9eb90d42dd0909d130b5bf636 SHA-1: 401af4aa228e79d24f8ca0c7ba235f84fa6d7a98 SHA-256: 15a663e175d32e00b0d44df0221c8c7dfe8b69b3f3df26323f1491975e02f6c2
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, but one critical link redirects to `https://ttraff.ru/pify?keyword=name+a+star+certificate`. This URL is flagged as a malicious redirector, indicating a likely phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing its malicious intent. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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.ru/pify?keyword=name+a+star+certificate
    • http://files.milliondollarsmile-pp.com/uploads/1/3/2/6/132681877/2289120.pdf
    • http://files.oportunityisknocking.com/uploads/1/3/1/4/131454503/4b551.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/7166/7360/files/tafadituv.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/livre_alimentation_saine.pdf
    • https://cdn.shopify.com/s/files/1/0439/8094/7614/files/manual_air_fryer_philco_saude_inox.pdf
    • https://cdn.shopify.com/s/files/1/0428/6126/5062/files/69984857501.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8951/files/le_boulanger_menu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6484/files/85935099489.pdf
    • https://cdn.shopify.com/s/files/1/0434/5937/9357/files/vapiwosozejivoni.pdf
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/jaxepu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3704/7449/files/ccna_200_125_drive.pdf
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/paper_cutting_book_contemporary_artists_timeless_craft.pdf
    • https://cdn.shopify.com/s/files/1/0434/7530/4612/files/25616081704.pdf
    • https://cdn.shopify.com/s/files/1/0435/9307/2808/files/missguided_size_chart.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/jubanose.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f67.bin
c9c6593a12e910bd138c75597444335d05418444167a129a9b3380436f684dd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F67 4536 bytes
font_01_sfnt_off00006ec0.bin
3a2ade74525fc20a8478288957a6d7b216fb12eaf6fc33776b564940bf7a5e00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC0 10256 bytes
font_02_sfnt_off000091d5.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91D5 4324 bytes

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