Malicious PDF — malware analysis report

Static analysis result for SHA-256 676cb06e1e2cdfbb…

MALICIOUS

PDF

44.3 KB Created: 2020-08-10 03:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9827997a6201bd00d6b49ae40327beb SHA-1: 2ef0ff160b343d0ae8a6f9c514ac795f77e64980 SHA-256: 676cb06e1e2cdfbbba340688869aff6eec3d651181a3866a66b4e81db1adcd00
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious URL, 'https://ttraff.ru/pify?keyword=libro+3msc+3+pdf', is flagged as a known malicious redirector. This suggests the document's purpose is to drive traffic to malicious sites, likely for SEO poisoning or to host phishing content.

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=libro+3msc+3+pdf
    • http://juxovesod.hudsonsteakhouse.co.uk/uploads/1/3/0/9/130969723/tumobu.pdf
    • http://files.tollyho.com/uploads/1/3/1/8/131856949/8558521.pdf
    • http://kifozij.wellbalancedfolsom.com/uploads/1/3/1/4/131452903/mebumawo.pdf
    • http://files.impunity.site/uploads/1/3/2/6/132681204/lefopogi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/9557/2126/files/47699451591.pdf
    • https://cdn.shopify.com/s/files/1/0433/4419/9848/files/javascript_timer_countdown_with_seconds.pdf
    • https://cdn.shopify.com/s/files/1/0440/4844/9686/files/paluvotedixubobodi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/kurojaremajiwuvuvimojozod.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/turepawoxowu.pdf
    • https://cdn.shopify.com/s/files/1/0441/3584/1944/files/58010891436.pdf
    • https://cdn.shopify.com/s/files/1/0450/2369/0916/files/dufanijifuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/1414/4675/files/68983734785.pdf
    • https://cdn.shopify.com/s/files/1/0437/3685/8776/files/53298020452.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/54856883134.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/rowudojemarepidelibete.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xutuxajaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/exercices_articles_partitifs.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_off000063d8.bin
0360508b13301292565e5074faf9e859c0257046cdb41212728888f305c3c9f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D8 4788 bytes
font_01_sfnt_off00007403.bin
29797cbb9f29b0055e8b9d922a00f8a1d8cb8414aee983495f5adb2d6c841764		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7403 10080 bytes
font_02_sfnt_off0000968b.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x968B 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.