Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2cb465cfdb92852…

MALICIOUS

PDF

47.9 KB Created: 2020-08-08 07:36:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b7818668d8c9be3653f9117621de1ef SHA-1: e15994957c0bc93c48d0f9807f33f3071c99389f SHA-256: b2cb465cfdb92852eae2524e4311e6a5b0f5437533c8341c094224bc5e29f411
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to external PDF files hosted on Shopify. The primary link, 'https://ttraff.com/pify?keyword=basic+electrical+engineering+textbook+pdf+download', is identified as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning scheme designed to drive traffic to malicious sites under the guise of providing free downloads.

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/pify?keyword=basic+electrical+engineering+textbook+pdf+download
    • http://files.gregbenken.com/uploads/1/3/0/7/130738892/1994898.pdf
    • http://nedokoj.mcclanahanlawoffice.com/uploads/1/3/1/3/131398140/724926.pdf
    • http://files.naacpaustin.com/uploads/1/3/1/3/131379894/4441134.pdf
    • http://vilezod.yusofgajahlingard.com/uploads/1/3/2/7/132710621/nojawebatajinewa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/50746349371.pdf
    • https://cdn.shopify.com/s/files/1/0429/1490/6275/files/bider.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/superbad_full_movie_online.pdf
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/tumazo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4326/6458/files/vubojino.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94448736580.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1723/files/arrl_antenna_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/23139222393.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/zakaton.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/67153088205.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/35512516253.pdf
    • https://cdn.shopify.com/s/files/1/0439/9942/8766/files/so4_oxidation_number.pdf
    • https://cdn.shopify.com/s/files/1/0437/5992/7448/files/gakobaxagizametebonodika.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_off0000639e.bin
20a4b1495641b08d86c93be0f6411f858c59a45236c663d255047b50dd9f808c
pdf-font-stream PDF embedded font (sfnt) at offset 0x639E 5736 bytes
font_01_sfnt_off00007747.bin
49f1c345582212729590e0456707ca92d3838aef8cba26fbcaa28f8c5b0a0640
pdf-font-stream PDF embedded font (sfnt) at offset 0x7747 2116 bytes
font_02_sfnt_off00008112.bin
135af801d725f8a666d261809e87e40d9c0e1596b0668785da0d96d28c70c11f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8112 14992 bytes