Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf82c33987af090…

MALICIOUS

PDF

47.7 KB Created: 2020-08-22 02:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc1951ce509e556485bd5215a1e6b4ec SHA-1: dc32c0a1bc5ba3e6beb59ff3ab680b3cc07c9c3e SHA-256: 9bf82c33987af090169b3a628c719b61e2d7b88a68b2a2876354e0b43adbfc5b
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at 'https://ttraff.com/pify?keyword=compass+direction+apk'. This redirector is likely used to deliver a second-stage payload. The document body, though heavily obfuscated, contains references to this malicious URL and other benign-looking PDF files hosted on Shopify, suggesting a link farm used for SEO poisoning or to obscure the true malicious destination. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=compass+direction+apk
    • http://files.stanleyshumkwanhon.com/uploads/1/3/0/7/130739308/4191074.pdf
    • http://files.linetweaker.com/uploads/1/3/1/0/131070688/9422473.pdf
    • http://dotekal.ccsdetroit.org/uploads/1/3/1/4/131437069/rukateliloxo.pdf
    • http://setadawa.thecraftbeersocial.com/uploads/1/3/1/4/131453133/muvadoketimo_botorudinasuge_sorisexuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/goanimate_comedy_world_creator.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/tikojabugolobigexuwopi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8212/9320/files/7048503210.pdf
    • https://cdn.shopify.com/s/files/1/0433/1326/6846/files/40181060264.pdf
    • https://cdn.shopify.com/s/files/1/0428/4776/4647/files/android_os_for_sony_tv.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/71092750700.pdf
    • https://cdn.shopify.com/s/files/1/0437/7614/7607/files/www_alc_co_cjp.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4577/files/konag.pdf
    • https://cdn.shopify.com/s/files/1/0435/4274/1143/files/79981593912.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7051/files/fesosotolisigixuzamut.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e44.bin
ab5fd44deeba692e706e966bb41836edfc5dadb5e30562ef72160b542959d9a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E44 5156 bytes
font_01_sfnt_off00006fa8.bin
78e94e2e47178245ca437e301e19f50dc99845ecc02da2ba30fe2b1e34051cc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA8 2092 bytes
font_02_sfnt_off0000794d.bin
2858c94f40c6b07196a6a13c2bb5746eccf383a45d1aee6e71ba2c7e9adb8130		 pdf-font-stream PDF embedded font (sfnt) at offset 0x794D 10152 bytes
font_03_sfnt_off00009c3e.bin
52510e4d70f3557fee5b5bbf0d3e68e4933a76b26214029a49039486d04c3985		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C3E 16224 bytes

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