Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7455ff39c99ed5…

MALICIOUS

PDF

39.4 KB Created: 2020-08-18 21:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e49a92df87c7558e17ca08067f824a71 SHA-1: 9a42358aae69a12cfadaedf9b326bb2acff7da21 SHA-256: 1f7455ff39c99ed5e6e96c2f96f66643a266867736a5ce91ba9697dd56185069
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded URLs, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a PDF link to a known malicious redirector at 'ttraff.ru', which is likely the primary malicious destination. The document body, though heavily obfuscated, contains text related to 'Ceramic tile design software free' and the malicious URL, suggesting a lure to entice users to click the malicious link. No scripts were extracted, and the PDF structure itself does not indicate further exploitation beyond the malicious link.

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=ceramic+tile+design+software++free
    • http://files.zenithfitnesstraining.com/uploads/1/3/2/6/132681823/lopisesu.pdf
    • http://files.rarepoultrysociety.com/uploads/1/3/2/6/132681342/xitumef_wegosu_desim.pdf
    • http://vojopune.bingilcg.org/uploads/1/3/1/8/131856907/5558879.pdf
    • http://toloz.chacalit.org/uploads/1/3/0/8/130874388/1067871.pdf
    • https://cdn.shopify.com/s/files/1/0431/1190/7488/files/44709469681.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/71246954270.pdf
    • https://cdn.shopify.com/s/files/1/0428/8049/9879/files/saxapujabivapevabokagusu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8328/2070/files/axar_publication_maths_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/bitefasodewono.pdf
    • https://cdn.shopify.com/s/files/1/0429/5540/7511/files/religion_of_the_ancient_celts.pdf
    • https://cdn.shopify.com/s/files/1/0429/2755/4723/files/the_economist_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/2943/6315/files/corsair_headset_software.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30553092986.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/8317603387.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d07.bin
17b5be47cddd8419703acd7d2d770dcac1a9d867862cd291f7de4a400f79ce52
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D07 5336 bytes
font_01_sfnt_off00006f22.bin
d5ea37c6a98e7ab22caebdaa8debe9399380d32f5f7cb12b5d97f9fe4973731e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F22 9880 bytes