Malicious PDF — malware analysis report

Static analysis result for SHA-256 506b3b5a93ad2c03…

MALICIOUS

PDF

40.0 KB Created: 2020-08-22 20:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d4618b5fd4b399c54d7c68f037aabe0 SHA-1: b251fbe635a477d44b85bf9e14e3d87e39e43ff6 SHA-256: 506b3b5a93ad2c030598b5734e89f71f93f6502b616745220d899b20b74ac411
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body text, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=skittles+lab+worksheet+answers', suggesting a lure to a malicious site. The presence of a link farm and a malicious redirector indicates an attempt to lead the user to a compromised or malicious resource.

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=skittles+lab+worksheet+answers
    • http://files.cecilyscloset.org/uploads/1/3/1/6/131607063/rusas.pdf
    • http://supiwon.the-nature-atelier.com/uploads/1/3/2/6/132682974/takotobabi.pdf
    • http://files.palmettopreswm.com/uploads/1/3/1/4/131455636/sodinirogat_febabanisi_gotazapub_gowur.pdf
    • http://files.ayrenmartinphotography.com/uploads/1/3/1/6/131607683/5156827.pdf
    • https://cdn.shopify.com/s/files/1/0434/7192/9496/files/standard_cv_format_for_job.pdf
    • https://cdn.shopify.com/s/files/1/0447/1989/8777/files/movies_bollywood_2015.pdf
    • https://cdn.shopify.com/s/files/1/0429/7723/1007/files/ropatagakukopepopavameti.pdf
    • https://cdn.shopify.com/s/files/1/0433/4839/4143/files/36830977324.pdf
    • https://cdn.shopify.com/s/files/1/0435/3949/7112/files/81873748924.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/bible_college_application_form_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/dodge_camper_van.pdf
    • https://cdn.shopify.com/s/files/1/0440/8731/2534/files/71772046091.pdf
    • https://cdn.shopify.com/s/files/1/0437/9010/6775/files/43776353046.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/foradenemazife.pdf
    • https://cdn.shopify.com/s/files/1/0431/2557/1733/files/29206552827.pdf
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/pogebopobev.pdf
    • https://cdn.shopify.com/s/files/1/0435/6145/1681/files/aluminium_die_casting_defects_and_remedies.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/
    • https://cdn.shopify.com/s/files/1/0431/2557/1733/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ca7.bin
3f34140dff077e1172760fb54eba6a132f0070156ab2766838b59a209d8f1cdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA7 5172 bytes
font_01_sfnt_off00006e45.bin
1dad7c8dab857d6598c715e814c37c941b94f54db9da7d53f7be3e55ffa73e40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E45 10608 bytes

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