Malicious PDF — malware analysis report

Static analysis result for SHA-256 278abc03e9c4bc07…

MALICIOUS

PDF

40.8 KB Created: 2020-08-04 02:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffc846dbabb72e17aa56b12afafe369d SHA-1: 1abd066185ae08db54d04d414cbe282ab04ef781 SHA-256: 278abc03e9c4bc077f09ddf4c76909d7d031106efb2771ca45b0af8f2ed8cb10
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=centrifugal+compressor+book+pdf', indicating a lure to download a PDF which then redirects to malicious infrastructure. The presence of numerous PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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=centrifugal+compressor+book+pdf
    • http://files.alvei.org/uploads/1/3/1/8/131856769/6789393.pdf
    • http://files.bamfordgodfrey.com/uploads/1/3/1/3/131383720/a47169da553b.pdf
    • http://lixerexa.razorsharp.com.sg/uploads/1/3/1/6/131606248/rusude-sizulow-diminub-kolewe.pdf
    • http://mujuro.distinctchurch.com/uploads/1/3/2/7/132712358/6c5e70.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8913/files/femevepilasedimowuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/77660702441.pdf
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/62554822164.pdf
    • https://cdn.shopify.com/s/files/1/0429/1464/4127/files/71189016512.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/52133740529.pdf
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/82046286505.pdf
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/ramogonuretoluwuzuxetude.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/jigir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/0005/3408/files/nivanejatesojer.pdf
    • https://cdn.shopify.com/s/files/1/0435/3749/8276/files/xowakobozadixowokumavig.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/mutolujipixur.pdf
    • https://cdn.shopify.com/s/files/1/0436/6961/8841/files/47153139466.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_off000060fa.bin
17f2137672bde67a7e7e5da8966e026a6ccef4b5c83372c0ac09b69da4d34584		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60FA 5584 bytes
font_01_sfnt_off000073dc.bin
300c55409509eea75e1708344166a55098fdce6eaef81f5d07d12fe0a41d76fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73DC 10104 bytes

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