Malicious PDF — malware analysis report

Static analysis result for SHA-256 6718cdee3f26f0a2…

MALICIOUS

PDF

34.7 KB Created: 2020-08-24 00:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbf1752ad63a66e8c16536b443bbf7bc SHA-1: 46317123023940911e5f1c787a9576552a805ed0 SHA-256: 6718cdee3f26f0a2216c8a135d8666bfe3232d02a2792329e04834726bfa5e3f
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to benign Shopify URLs, but also includes a critical link to a known malicious redirector at 'ttraff.ru'. This suggests a tactic to obscure malicious destinations or engage in SEO manipulation for malicious purposes. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely related to phishing or malware distribution.

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=cymbal+sound+pack
    • http://lexapoba.greaterlifeheritage.com/uploads/1/3/1/0/131070306/bixipitademusewu.pdf
    • http://tufagaji.trailsidecountrystore.com/uploads/1/3/2/7/132740328/6154205.pdf
    • http://files.dagtypefilms.com/uploads/1/3/1/0/131070866/godunob.pdf
    • http://vurulab.frasersbeveragecompany.com/uploads/1/3/0/8/130874655/xomul_wusonal.pdf
    • http://files.portersbar.com/uploads/1/3/1/0/131070841/4984199.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/45631747809.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/mappa_metro_amsterdam_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8442/files/fosepipatesuvafosuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7249/files/graphing_shapes_on_coordinate_plane_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0447/9172/6240/files/uti_test_strips_walmart.pdf
    • https://cdn.shopify.com/s/files/1/0431/0443/6390/files/jenadodula.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojezurin.pdf
    • https://cdn.shopify.com/s/files/1/0431/8694/6206/files/college_mate_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0431/7036/5589/files/menezomofigesovefojub.pdf
    • https://cdn.shopify.com/s/files/1/0464/7868/8408/files/12497814777.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_off00004b03.bin
dc61c0a787b0b87c2b1e3745d90c118eb50d4702d90391d9651fc9683f117e2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B03 5332 bytes
font_01_sfnt_off00005d0d.bin
4f9ce02e0d5427e792c0ff7eb0d6187fad1b440388e0164a239cba629eeff272
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0D 9708 bytes