Malicious PDF — malware analysis report

Static analysis result for SHA-256 59de8fd500b58fce…

MALICIOUS

PDF

40.1 KB Created: 2020-08-08 05:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb0a96e080031434f5c5a6f00baa8b62 SHA-1: a29ea23366f8d367c618772c3122dff582deb97f SHA-256: 59de8fd500b58fce04f36b4a8a4cc5d1f88282011c83a3d91b0de8d563631edb
128 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 are hosted on Shopify but appear to be part of a link farm. One critical heuristic identified a link to a known malicious redirector infrastructure, which is the primary indicator of malicious intent. The document body, though heavily obfuscated, contains the URL that triggers the redirector, suggesting a lure to download further content or navigate to a malicious site. No scripts were extracted from this sample.

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=nios+admission+form+pdf+2020
    • http://files.earth-protect.org/uploads/1/3/1/0/131070866/lefoz.pdf
    • http://lapoxam.horshamcarwash.net/uploads/1/3/2/6/132682883/539821f81.pdf
    • http://files.leeloosesotericorner.com/uploads/1/3/1/3/131383754/5775597.pdf
    • http://files.literacycenterofharlingen.org/uploads/1/3/1/4/131438667/laferi.pdf
    • http://files.rumah-indonesia.org/uploads/1/3/0/7/130775516/5c4fa49597596.pdf
    • https://cdn.shopify.com/s/files/1/0434/0970/3061/files/present_continuous_tense_exercises_fill_in_the_blanks.pdf
    • https://cdn.shopify.com/s/files/1/0434/4443/7144/files/synonyme_finden_bung.pdf
    • https://cdn.shopify.com/s/files/1/0432/9606/3652/files/lepidezejelaf.pdf
    • https://cdn.shopify.com/s/files/1/0443/7016/5916/files/aesthetic_and_ergonomic_considerations_in_design_of_products.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0070/files/netaperilafozura.pdf
    • https://cdn.shopify.com/s/files/1/0434/1959/9004/files/tikaxifiwa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/tegadukidu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8147/9832/files/budaya_kerja_cemerlang.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/62727779355.pdf
    • https://cdn.shopify.com/s/files/1/0434/1966/4542/files/11567699036.pdf
    • https://cdn.shopify.com/s/files/1/0432/1784/6427/files/cambios_psicolgicos_en_la_adolescencia.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0094/files/the_boy_who_cried_wolf.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_off00005ec3.bin
2b4c65bd61130147dd32cc26a3c602e48832d2cf3f8a70918b2b6a2c9f49b6a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC3 5396 bytes
font_01_sfnt_off0000710c.bin
8ab4f6522af4c52abb85dcd8506a92b05f0b4f41083ab96151013b603df68f07
pdf-font-stream PDF embedded font (sfnt) at offset 0x710C 10040 bytes