Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62b66ef8114aa5d…

MALICIOUS

PDF

62.5 KB Created: 2020-08-22 13:23:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b34216194c7c42a884bea79b31be753 SHA-1: 87db4ec52df3d833985d8a53eb8e85dc3d22c7ac SHA-256: b62b66ef8114aa5dfab7b4b0327d6a15fe0cd00a5488ab11176e01bd68344b61
120 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, many of which point to a redirector URL known to host malicious content. The document body, though heavily obfuscated, contains text that appears to be a lure for an annual report, directing users to click the malicious link. The primary malicious IOC is the redirector URL, which is likely used to serve a second-stage payload.

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.cc/pify?keyword=lautan+luas+tbk+annual+report
    • http://files.markkeohanephotography.com/uploads/1/3/1/4/131409794/f317e5c2.pdf
    • http://files.stefanschwarzkopf.com/uploads/1/3/2/6/132682883/tawafavazevos-lilirejagujebuz-tudurig.pdf
    • https://cdn.shopify.com/s/files/1/0436/1427/3693/files/agrippa_three_books.pdf
    • https://cdn.shopify.com/s/files/1/0434/1537/1932/files/47800874812.pdf
    • https://cdn.shopify.com/s/files/1/0430/9093/5969/files/eamon_fk_it_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/wosomimo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/96210827904.pdf
    • https://cdn.shopify.com/s/files/1/0428/1086/7871/files/29333426321.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/adjektivdeklination_bungen_b1_mit_lsungen.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/infrared_proximity_sensor_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/6450/9094/files/vadek.pdf
    • https://cdn.shopify.com/s/files/1/0435/9002/5379/files/age_uk_deprivation_of_assets_fact_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/sirizifanirinadiva.pdf
    • https://cdn.shopify.com/s/files/1/0431/5414/5444/files/external_ventricular_drain_management_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0429/8522/6393/files/93787777833.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_off0000b742.bin
fdf8c5e053ab1d2aa8a7aed4001477676541c8cbcbe08083c6f3c686a9f552a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB742 4956 bytes
font_01_sfnt_off0000c824.bin
55acfe1f8408c799264e36d8bee2768d7fe41b461660cbc2a892c4f4f386342a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC824 11112 bytes

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