Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7c04de2cfcc4523…

MALICIOUS

PDF

41.3 KB Created: 2020-08-30 03:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47ff4fc1cc033cf4a7f92295f97b5edb SHA-1: 644c969858a2c50e305bc051be8dbbcef947be09 SHA-256: a7c04de2cfcc4523d7dc3c9666b77d087b5be008508fbf14d04377723f2309b2
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One of these links, 'https://ttraff.link/wix?keyword=serum+ferritin+iron+deficiency+anemia', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify URLs, suggesting a lure to external content. The presence of a malicious redirector indicates an attempt to direct users to a harmful destination.

Heuristics 3

  • 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.
  • 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.link/wix?keyword=serum+ferritin+iron+deficiency+anemia
    • https://cdn.shopify.com/s/files/1/0461/9413/1093/files/complete_blood_count_sample_report.pdf
    • https://cdn.shopify.com/s/files/1/0448/2560/8353/files/android_tablet_as_second_monitor_hdmi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7961/5142/files/honda_gx160_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2650/files/flowchart_diagram_examples_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/club_car_golf_cart_service_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5275f14275f4be9b28eedb7b2fde6de.pdf
    • https://static.usrfiles.com/ugd/f80014_a8b45261d4644a1085480c58e61a487e.pdf
    • https://static.usrfiles.com/ugd/cc10e7_45b405e3151b4f0aa4dc721fa91c27db.pdf
    • https://static.usrfiles.com/ugd/b8c837_707c470881784b64a31dbf038cab22b6.pdf
    • https://static.usrfiles.com/ugd/52b593_f26fff7d69854ebc97a1d649d2ec17bf.pdf
    • https://static.usrfiles.com/ugd/9374a7_542bd25d55664154b29224a40382f516.pdf
    • https://static.usrfiles.com/ugd/b4609a_2db3f8872a97442e92cab37447da4ef8.pdf
    • https://static.usrfiles.com/ugd/b8c837_654768dc757848ccb55b075d94197deb.pdf
    • https://static.usrfiles.com/ugd/de3d83_8859f9bc660345f5b2095e06f4877422.pdf
    • https://static.usrfiles.com/ugd/b80405_4f20023736c1471e8e0f6313935660ba.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_off00006481.bin
dc00e9351a3837a979e5f3abdf9f3178c862e744f6ab2e546f0e364c3b9525fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6481 5160 bytes
font_01_sfnt_off000075f9.bin
b266be586ec9af0bf082f160a0e2434e7408253b55e3e4ea972a3f1f2025b898		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F9 9936 bytes

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