Malicious PDF — malware analysis report

Static analysis result for SHA-256 e39f07ff07c29eb5…

MALICIOUS

PDF

40.2 KB Created: 2020-08-18 22:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0342a1c93a281cae08d322837dd63156 SHA-1: a210f0836aa432ff2fad72a99d2661d27dc4fb70 SHA-256: e39f07ff07c29eb56ed9f83cfee29d45afd04aec1cba836353f40ab6b00296dd
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to Shopify domains hosting other PDFs. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a phishing page or malware download site.

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.ru/pify?keyword=upvc+door+hinge+adjustment+guide
    • http://wirumi.shanghaicarrentalservice.com/uploads/1/3/0/9/130969363/e95dc6c8700f2.pdf
    • http://files.new-condo-launch.com/uploads/1/3/2/6/132681378/betojof_xuduwikemiwukad.pdf
    • http://files.ttownacres.com/uploads/1/3/0/7/130776611/gunukirut.pdf
    • https://cdn.shopify.com/s/files/1/0440/6837/2632/files/97869635426.pdf
    • https://cdn.shopify.com/s/files/1/0433/5963/3559/files/perenewukekujebazezeru.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/lavulere.pdf
    • https://cdn.shopify.com/s/files/1/0434/2625/0917/files/12421995433.pdf
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/55549701467.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/update_android_samsung_tab_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/75517144226.pdf
    • https://cdn.shopify.com/s/files/1/0434/9352/3618/files/toss_up_rules.pdf
    • https://cdn.shopify.com/s/files/1/0436/1594/4867/files/mejikopimanugixemezusiwuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/37888664477.pdf
    • https://cdn.shopify.com/s/files/1/0433/7952/3751/files/lokabosibujotubumexijines.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_off00005ef7.bin
ecb7a45e99a0b9a3c0dad7cd3ba3f5d6fb44e70c9dec4e38d1dd7b9bb7b0dd9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF7 5580 bytes
font_01_sfnt_off000071ce.bin
3f7a58ceccc6f1de7f9809e4ab6d3427f29ee77aaa3569036d9dfb255b0b1f35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71CE 9944 bytes

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