Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fdc4ffb56df8af9…

MALICIOUS

PDF

49.2 KB Created: 2020-08-09 16:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df44a5f618148af6e060284276837125 SHA-1: 62018d60db742d5dc2f367fec2396d5fb1b285ee SHA-256: 2fdc4ffb56df8af92c4d61dd5374139e0425b1ac3fad49d0df799501df66ee6c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, forming a link farm. One of these links, https://ttraff.com/pify?keyword=pilates+para+hernia+de+disco+lombar+pdf, is identified as a malicious redirector. This suggests the document is designed to lure users to malicious sites through a deceptive link farm, likely for 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.com/pify?keyword=pilates+para+hernia+de+disco+lombar+pdf
    • http://files.cubatrips.ca/uploads/1/3/0/8/130874495/4395073.pdf
    • http://files.banksfamily2017.com/uploads/1/3/2/7/132712129/4892911.pdf
    • http://files.mehmet-akin.net/uploads/1/3/1/1/131164504/2569289.pdf
    • http://files.ataraxiaphotography.com/uploads/1/3/1/4/131455883/jazozixure.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/up_b._ed_entrance_exam_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/2109/0471/files/35878563109.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/xoguv.pdf
    • https://cdn.shopify.com/s/files/1/0429/4803/4716/files/zidutosiwimuwip.pdf
    • https://cdn.shopify.com/s/files/1/0437/2958/4293/files/verb_be_present_simple.pdf
    • https://cdn.shopify.com/s/files/1/0431/1538/0892/files/foleveniwopetokaguru.pdf
    • https://cdn.shopify.com/s/files/1/0432/2898/7547/files/mutenimawekis.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/34843114628.pdf
    • https://cdn.shopify.com/s/files/1/0440/5713/3221/files/business_communication_notes_for_b._com_1st_sem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xirapekewovefosisukepeja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zemivok.pdf
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/45907615985.pdf
    • https://cdn.shopify.com/s/files/1/0430/9545/7941/files/funeruwofafalinunizin.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_off0000821a.bin
b8c0a83dec876eb9e64c70e2ef7516884f61ef631fc267beeec7e6863b1bb155
pdf-font-stream PDF embedded font (sfnt) at offset 0x821A 5536 bytes
font_01_sfnt_off000094bf.bin
c0016a41c2e6b5151a315dc04a558d150143c0b295e6be5b0123ebc339349428
pdf-font-stream PDF embedded font (sfnt) at offset 0x94BF 10264 bytes