Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ccee1b600acebc…

MALICIOUS

PDF

43.7 KB Created: 2020-08-19 16:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 725aac2b725a53cf7aa2e861bbc3b1ee SHA-1: 76520cbce6528f9f5a3c04936dbf21757eab5b19 SHA-256: d7ccee1b600acebcc9f982c1ea229333896eb603c744172f5d041a0c9c1bf383
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. This redirector is disguised as a search result for a dictionary PDF, indicating a lure to trick users into clicking. The primary malicious URL is https://ttraff.ru/pify?keyword=dictionary+cambridge+english+pdf, which is likely used to funnel victims to further malicious content. No scripts were extracted, and the document body is heavily obfuscated, but the heuristic firings clearly indicate a malicious redirector and a link farm strategy.

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.ru/pify?keyword=dictionary+cambridge+english+pdf
    • http://sobiv.underthemoonlightsg.com/uploads/1/3/0/7/130739564/toxumudetijazusaju.pdf
    • http://files.bayareapatioliquidation.com/uploads/1/3/1/0/131070146/sedizunove.pdf
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/34109409430.pdf
    • https://cdn.shopify.com/s/files/1/0432/7656/6684/files/wofebovotifozobamulekaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1825/files/46094767350.pdf
    • https://cdn.shopify.com/s/files/1/0450/4292/5726/files/carmen_bizet_habanera.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/street_fighter_4_mod_apk_rexdl.pdf
    • https://cdn.shopify.com/s/files/1/0436/5526/6457/files/st_alphonsus_liguori_moral_theology.pdf
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/thinkbook_13s.pdf
    • https://cdn.shopify.com/s/files/1/0432/8567/6188/files/bocio_tiroideo_difuso.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6971/files/quran_surah_al_kahf_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/4292/8790/files/23883389186.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/genirenet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88406012193.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_off00006b81.bin
dbf5327bb63fd22a4363520b17a10a98684b90137d25f14bc2af39e16c9b26bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B81 5808 bytes
font_01_sfnt_off00007f1b.bin
05150559d847199e41e96ab207104b9e6df29243c200a95eea4030eaed6f36da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1B 10236 bytes

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