Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df271369fada1e2…

MALICIOUS

PDF

45.7 KB Created: 2020-09-01 02:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38d2a53ba7c2698c18aef6423755a0e3 SHA-1: 8dd5af7dbf19a5d5b0239313a1c35183eea629c7 SHA-256: 4df271369fada1e251da7f09c670d47f6aacc860300846570f0faafa402115dd
152 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.link, which is disguised as an 'afghanistan passport online form'. This indicates a phishing attempt to lure users to a malicious site. The file also contains a large number of links to PDFs hosted on Shopify, likely part of an SEO link farm to improve search engine ranking for malicious content. No scripts were extracted, but the presence of the malicious redirector and the lure content strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=afghanistan+passport+online+form
    • https://cdn.shopify.com/s/files/1/0435/4660/7784/files/11240010906.pdf
    • https://cdn.shopify.com/s/files/1/0433/5976/4634/files/make_something_up_chuck_palahniuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/8191/5798/files/75399307213.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/vezurutekorin.pdf
    • https://cdn.shopify.com/s/files/1/0457/8630/0572/files/59875817671.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/zojutafupidumokiku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91300886864.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9137/files/retovujujasisaluwis.pdf
    • https://cdn.shopify.com/s/files/1/0434/4561/6792/files/mataji_aarti_video.pdf
    • https://cdn.shopify.com/s/files/1/0440/4844/9686/files/amazing_grace_song_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/2656/0677/files/how_to_fill_soul_gems.pdf
    • https://cdn.shopify.com/s/files/1/0433/7670/5690/files/the_complete_japanese_joinery.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0583/files/lopomel.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/zoneratikuguwuwijuxenid.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/53677801395.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_off00006753.bin
4e5fcd8ddb4a74f796c28bc73d39de51b4b87ede483c427cde57d8b86f7d30e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6753 5092 bytes
font_01_sfnt_off0000786f.bin
046a474c2a3668dfe53c69820d43a388ba4c04aec4013ea64a3079cd33476d47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x786F 10256 bytes
font_02_sfnt_off00009b74.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B74 4324 bytes

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