Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb90bc813119362…

MALICIOUS

PDF

34.1 KB Created: 2020-08-22 20:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62cb0e8d806179c235d8d2fc7f947739 SHA-1: 4b783bf7417ab41b851eff3f9e6415d4a86695df SHA-256: adb90bc81311936285f6c029e681b5fa215bab9c580c9526bf1f1b2d7a421e2d
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a malicious redirector link, and another identified a link farm structure. The document body contains text related to software downloads, suggesting a lure to trick users into clicking these links. The primary redirector URL is https://ttraff.cc/pify?keyword=hungry+shark+evolution++uptodown, which likely leads to further malicious content.

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.cc/pify?keyword=hungry+shark+evolution++uptodown
    • http://files.nataliebritecoaching.com/uploads/1/3/0/8/130814245/6ec0e.pdf
    • http://files.teenconcussion.com/uploads/1/3/0/9/130969140/kinenupere_bigewoz_jesafifavum.pdf
    • http://files.rcprayertabernacle.com/uploads/1/3/1/4/131406060/20238618f6c1.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2384/files/jikuzasijifukebadat.pdf
    • https://cdn.shopify.com/s/files/1/0432/7482/9987/files/annotates_android.pdf
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/android_ordner_mit_pc_synchronisieren.pdf
    • https://cdn.shopify.com/s/files/1/0438/9814/2875/files/buchungsbesttigung_vorlage.pdf
    • https://cdn.shopify.com/s/files/1/0438/0858/7936/files/english_grammar_learning_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33078626275.pdf
    • https://cdn.shopify.com/s/files/1/0436/3055/9390/files/cgst_bare_act.pdf
    • https://cdn.shopify.com/s/files/1/0434/0819/5738/files/tx_annotation_driven.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/numakoxalapejaluzonagug.pdf
    • https://cdn.shopify.com/s/files/1/0433/3246/8890/files/4555047688.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/62586958085.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_off0000495b.bin
1996c3123222d7c4118d1b856a9ac0394b89f51005dea1c6bc4f961562670a07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x495B 5500 bytes
font_01_sfnt_off00005c19.bin
a4489926b8058ae7f7b6e6313a037a0bb9f54ea4ef98263e5d078d5379105d69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C19 9428 bytes

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