Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5cf4dc869a84ef…

MALICIOUS

PDF

70.7 KB Created: 2020-08-11 20:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 020190f6ef8a9e2c15d6d04b0d12a1fa SHA-1: 4f5c3ca199c72023cd62b8bfc006f818fb7f5cc5 SHA-256: de5cf4dc869a84ef4dbffd2822328d991e900a34ded9a03dd0d45d2aad2292ad
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/wb?keyword=lakshmi%20narasimha%20karavalamba%20stotram%20in%20sanskrit%20pdf'. The document body also contains this URL and a call-to-action phrase, suggesting a lure to trick users into clicking the malicious link.

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/wb?keyword=lakshmi%20narasimha%20karavalamba%20stotram%20in%20sanskrit%20pdf
    • http://files.ersolutions.ie/uploads/1/3/2/6/132682585/nomubavalane_degudok.pdf
    • http://files.npcpasolutions.com/uploads/1/3/0/7/130739809/7ada00b.pdf
    • http://nedimexa.ziongale.com/uploads/1/3/1/4/131407178/tasovawedokokub.pdf
    • http://files.cuddlykoalaspreschool.org/uploads/1/3/1/3/131381374/a2dbf92e.pdf
    • http://files.obmassage.com/uploads/1/3/1/4/131407106/naronivu-rakuwuj-tirurorisakuw-vanifovoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/5034/4352/files/fafaxivoxubod.pdf
    • https://cdn.shopify.com/s/files/1/0437/2951/8746/files/legojajikitasuwipute.pdf
    • https://cdn.shopify.com/s/files/1/0438/3748/9309/files/bulalupefolubutonigukunab.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/65853069044.pdf
    • https://cdn.shopify.com/s/files/1/0430/0659/1127/files/dead_sea_scrolls_translated_into_english.pdf
    • https://cdn.shopify.com/s/files/1/0428/7961/5142/files/tojawaripamomosolapute.pdf
    • https://cdn.shopify.com/s/files/1/0436/2305/5523/files/gleichnamige_brche_addieren_aufgaben.pdf
    • https://cdn.shopify.com/s/files/1/0435/5850/2563/files/gaussian_elimination_with_partial_pivoting.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7660/files/javascript_binary_to_decimal.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3627/files/tuziberumevizisovoke.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000d891.bin
620fcf143b8f030c0a9ee8511e4e15e2ef7bb49c21a000cc26dded7b86107352		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD891 17372 bytes
font_00_sfnt_off00007b3c.bin
0fe3b9839e4e556f592d2997108671619262fa508aa1c593fa3bdd47167f776f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3C 5488 bytes
font_01_sfnt_off00008db5.bin
b9b49a3c453c53986d7a61d4291ac5a87065d82ff96be43ef0dca6427e6dc540		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB5 3772 bytes
font_02_sfnt_off00009959.bin
95bb38b234ea37c5eb41ea9ff0dfe72031a02c9348285511ca6a5b369bff691c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9959 13332 bytes
font_03_sfnt_off0000c33f.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC33F 16164 bytes

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