Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f1de0306f3eb2ae…

MALICIOUS

PDF

41.7 KB Created: 2020-08-12 07:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac2e10b421e5c5992f9288bd97827494 SHA-1: 70edf30f41d47d79f6ff9decd1b8175ccebfe607 SHA-256: 2f1de0306f3eb2ae6232b1f7983d452cd8247f3f274beacc1e471485efe6467c
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a primary link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains text related to 'business english course description pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/wb?keyword=business%20english%20course%20description%20pdf
    • http://files.houseofindians.org/uploads/1/3/0/9/130969446/6285338.pdf
    • http://files.inspiredayurveda.com/uploads/1/3/1/3/131384127/voxapupus_zarusanasavora_zenoluloja_winaragoraw.pdf
    • http://files.robeycreekbeagles.com/uploads/1/3/1/4/131483391/sezupidegas_tapog.pdf
    • http://files.losangelesaazk.org/uploads/1/3/0/7/130739810/zewotet_bomimipaf.pdf
    • https://cdn.shopify.com/s/files/1/0440/1748/3934/files/vemojelodofewi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8240/7335/files/60264870492.pdf
    • https://cdn.shopify.com/s/files/1/0438/0013/3793/files/aircraft_structures_for_engineering_students.pdf
    • https://cdn.shopify.com/s/files/1/0438/5875/5749/files/nigimawibazori.pdf
    • https://cdn.shopify.com/s/files/1/0434/7795/8816/files/jomupodosupimabuwunop.pdf
    • https://cdn.shopify.com/s/files/1/0437/3161/5909/files/59342603483.pdf
    • https://cdn.shopify.com/s/files/1/0429/6169/8969/files/8486758113.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/13466404021.pdf
    • https://cdn.shopify.com/s/files/1/0437/5078/5173/files/profab_cable_tray_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0436/3576/9497/files/biodata_format_for_pharmacist.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/kezelejiworupovomokezo.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_off0000653d.bin
fce9b0b9acb13b55c5f9947aaf2ef4b4251377d271914ccdd861f3bc611454fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x653D 5256 bytes
font_01_sfnt_off0000770f.bin
81093711c164689ee6ee37bb1116d6968f78d4fa5adc4d98ed3500c232dd2565		 pdf-font-stream PDF embedded font (sfnt) at offset 0x770F 10144 bytes

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