Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d00538d0ade2140…

MALICIOUS

PDF

41.7 KB Created: 2020-08-25 04:31:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3c822f5a1e19425bc519431f1262497 SHA-1: 6cce883fcde6e776967c1bb7cca2b747fc61f841 SHA-256: 4d00538d0ade2140045b24996ef667dbed1961e2ec6726d15a8d17710d99e786
128 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links, https://ttraff.ru/pify?keyword=best+chat+apps+for+android+phones, is identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'best chat apps for android phones' and the malicious URL, suggesting a lure to drive traffic to malicious infrastructure. No scripts were extracted from this sample.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=best+chat+apps+for+android+phones
    • http://wowalo.johnhunterdesign.com/uploads/1/3/1/4/131438216/kuvujutimuf.pdf
    • http://fesod.avhabitat.org/uploads/1/3/1/4/131437778/7555452.pdf
    • http://pemonena.mrscainsclass.com/uploads/1/3/1/6/131606407/1945971.pdf
    • http://files.litzmusic.com/uploads/1/3/1/3/131384286/gudapov_sajelulalarola.pdf
    • http://files.americanrugger.com/uploads/1/3/0/9/130969967/6506060.pdf
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/valumavurozapoxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7670/files/61743162120.pdf
    • https://cdn.shopify.com/s/files/1/0450/4082/8566/files/html_template_engine_java.pdf
    • https://cdn.shopify.com/s/files/1/0435/6784/1443/files/mugewujaxanida.pdf
    • https://cdn.shopify.com/s/files/1/0439/0794/0520/files/45911749764.pdf
    • https://cdn.shopify.com/s/files/1/0434/2782/3778/files/sopunajedanedi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9733/3664/files/rajebajugobavake.pdf
    • https://cdn.shopify.com/s/files/1/0437/0294/3899/files/kidokimunugeki.pdf
    • https://cdn.shopify.com/s/files/1/0447/4427/8170/files/curso_de_numerologia_tantrica.pdf
    • https://cdn.shopify.com/s/files/1/0433/2801/2456/files/symantec_dlp_admin_guide_15._5.pdf
    • https://cdn.shopify.com/s/files/1/0432/6116/5723/files/jaluk.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3258/files/vibugaxiroxepudunit.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_off00006518.bin
b93f4433b7411a4b0da7455fa45f871dcc45d6aab3292e20b6c888f81571ae82
pdf-font-stream PDF embedded font (sfnt) at offset 0x6518 5260 bytes
font_01_sfnt_off000076f1.bin
eefc523c4cc2c2655c9dc1b7889afb9478360f395f661d1c1746bad7c16038d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x76F1 10216 bytes