Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd544e315cdeb39…

MALICIOUS

PDF

39.4 KB Created: 2020-08-22 19:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6117a79a340b9e7f9177976b68ff0ba SHA-1: cc109f9aca35ec40c0554fe093d9ca9971f57369 SHA-256: 3fd544e315cdeb397257cdf6453e5b3f0c1ad117e5ed883bb6bcfb0d03756053
128 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, disguised as a download for 'Shazam for windows phone'. This is further supported by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged by PDF_SEO_LINK_FARM. The presence of a visual download button lure reinforces the social engineering aspect.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=shazam+for+windows+phone
    • http://supel.kenanleparc.com/uploads/1/3/2/7/132712207/tepukefutogob-kesatew-gofisob.pdf
    • http://files.aliceannephotography.com/uploads/1/3/1/3/131379447/xisejexopore.pdf
    • http://nokube.tjmartialarts.com/uploads/1/3/0/9/130969204/xujugal.pdf
    • http://files.proyecto1867.com/uploads/1/3/2/3/132302913/mozolejemi-vexiramiga-leselu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69901941500.pdf
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/16060002802.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/76947413262.pdf
    • https://cdn.shopify.com/s/files/1/0463/8883/8555/files/simple_complete_predicate_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0436/8809/9993/files/58012952457.pdf
    • https://cdn.shopify.com/s/files/1/0440/6486/6469/files/71831787891.pdf
    • https://cdn.shopify.com/s/files/1/0437/5625/7441/files/46841473073.pdf
    • https://cdn.shopify.com/s/files/1/0454/6661/5966/files/allianz_company_profile.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/naxutupululupawobut.pdf
    • https://cdn.shopify.com/s/files/1/0435/1954/1416/files/19655606686.pdf
    • https://cdn.shopify.com/s/files/1/0437/8833/7303/files/angielski_wszystkie_czasy_wiczenia.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_off00005b4a.bin
2a32b789e5e84d00652dc728a271948f2818de93dd03bfb2bf4b98af037e5fd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B4A 5496 bytes
font_01_sfnt_off00006ded.bin
574997cf5d0a4c085c2f41e617556e7f725695aefac0806122dc0a56bdda7787
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DED 10140 bytes