Malicious PDF — malware analysis report

Static analysis result for SHA-256 951de39f62753050…

MALICIOUS

PDF

40.2 KB Created: 2020-08-30 11:37:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11b288de93bb3a4a40c152f57ddd0fc8 SHA-1: ab5dc81a67d81dc4e94762c35ef576b670f540be SHA-256: 951de39f62753050dd409351338455edca7ff15bf2ddeee2bff7c7b6ec6cfd67
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users to malicious sites. The document body, though heavily obfuscated, contains the same URL and references a topic that could be used as a lure. The PDF also hosts a large number of other PDF files on Shopify domains, suggesting a link farm or SEO poisoning attempt. No scripts were extracted, but the presence of malicious links is sufficient evidence of malicious intent.

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.cc/wix?keyword=how+to+tell+if+blocked+on+discord
    • https://cdn.shopify.com/s/files/1/0440/6493/1992/files/jivatuvekuni.pdf
    • https://cdn.shopify.com/s/files/1/0449/2899/1399/files/ppt_org_chart_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/9333/4952/files/reiseangebote_im_internet.pdf
    • https://cdn.shopify.com/s/files/1/0440/4455/0294/files/understanding_public_policy_13th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/6900/4190/files/hammersmith_neurological_examination.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8188/files/alpha_house_season_2.pdf
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/grant_cardone_obsessed.pdf
    • https://cdn.shopify.com/s/files/1/0437/1621/4939/files/mopofumut.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/68676766694.pdf
    • https://cdn.shopify.com/s/files/1/0429/5992/9503/files/skilled_occupation_list_australia_2020_17.pdf
    • https://cdn.shopify.com/s/files/1/0432/9468/7400/files/java_algorithm_examples.pdf
    • https://cdn.shopify.com/s/files/1/0437/0019/1387/files/30334779051.pdf
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/zoxixebut.pdf
    • https://cdn.shopify.com/s/files/1/0431/8674/9604/files/78202231824.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_off00005f55.bin
e03b4f816fd8d64d7dc74fdea87fd5326bee5756459e8466d43c15b483429315
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F55 5060 bytes
font_01_sfnt_off000070ac.bin
c50b6f168417423bc6e803dfaf70a4e6411f30f7ce262541b8b06070c5cabacd
pdf-font-stream PDF embedded font (sfnt) at offset 0x70AC 10352 bytes