Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5dc4c7772c942c7…

MALICIOUS

PDF

45.4 KB Created: 2020-08-21 07:12:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c237f7c1b163612ab014b8edb7ba3f9e SHA-1: 623c6c3867147d0948939ab921b6ba8c9959d388 SHA-256: a5dc4c7772c942c71e23818b8301a89fd4e9b3a41ef6e0c19928378d0fde0299
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=cara+skip+verifikasi+gta+5+android'. Additionally, it exhibits a 'Fake CAPTCHA' heuristic, indicating a social engineering tactic to trick users into clicking the link. The document body, though partially corrupted, contains the same lure text and URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or distributing malicious content.

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=cara+skip+verifikasi+gta+5+android
    • http://files.wildandbloomfloral.co.nz/uploads/1/3/1/8/131856827/1866724.pdf
    • http://temigib.myrottweiler.org/uploads/1/3/2/7/132740764/5557b5e4cf2ee2c.pdf
    • http://files.ildiamon.com/uploads/1/3/0/7/130776589/fimipofeka_sepolujebiji_lowikakuloz.pdf
    • http://zakabox.extratimeconcierge.com/uploads/1/3/0/7/130775565/fc095a32a7.pdf
    • https://cdn.shopify.com/s/files/1/0435/3179/6632/files/16423205307.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/bikije.pdf
    • https://cdn.shopify.com/s/files/1/0432/1283/2931/files/rudofsky_architecture_without_architects.pdf
    • https://cdn.shopify.com/s/files/1/0436/4563/2665/files/morne_s_great_hammer.pdf
    • https://cdn.shopify.com/s/files/1/0440/7007/6566/files/jenkins_generate_xml_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jotinu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/pigibogewa.pdf
    • https://cdn.shopify.com/s/files/1/0464/8465/2184/files/battery_saver_app_for_nokia_e5.pdf
    • https://cdn.shopify.com/s/files/1/0430/2913/5521/files/exercise_adherence_rating_scale.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cd5.bin
9b39ae781c0f65bac03e6ff5722b67436c71ba5fd672458b0cda3dc7307b9990
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD5 5328 bytes
font_01_sfnt_off00006eda.bin
d6cd12047a20bd013a9008d311070cd27aea0324892a6a5f406bf5f932bf6658
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDA 2900 bytes
font_02_sfnt_off00007978.bin
fd5a0a63f127f31e711ab72647ec6c0d3e5f073017ad518b1095afb67523c273
pdf-font-stream PDF embedded font (sfnt) at offset 0x7978 15176 bytes