Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a8fab9689aca676…

MALICIOUS

PDF

44.2 KB Created: 2020-08-19 03:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f7011d785f4065b487a2c99defcceba SHA-1: e3db34cd8bf90ed3bc617c956eeeec6fc0ae903e SHA-256: 3a8fab9689aca6764015f2f96978bd659f7c9ec3b74b344bcbe321fcba9960be
120 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 'https://ttraff.ru/pify?keyword=com.+ionitech.+airscreen+pro+apk'. This URL is likely used to redirect users to a malicious site. The document also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm used for SEO poisoning or to obscure malicious destinations. The document body contains garbled text but includes the suspicious URL and references to an APK file, suggesting a lure for users to download potentially malicious software.

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=com.+ionitech.+airscreen+pro+apk
    • http://files.tedgoodden.net/uploads/1/3/0/8/130814232/7dbe1ef0.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1558/files/65583192877.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/8365650837.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/72424169051.pdf
    • https://cdn.shopify.com/s/files/1/0433/0897/4235/files/mijodixa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0210/1923/files/kiwakumoduwiwexeri.pdf
    • https://cdn.shopify.com/s/files/1/0432/4039/0819/files/vacancy_in_ethiopian_reporter_newspaper_amharic_version.pdf
    • https://cdn.shopify.com/s/files/1/0431/1449/6161/files/98778692375.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/silicosis_disease.pdf
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/lixugiredojamobu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5509/files/31021388981.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058f8.bin
7887dabbe53a0b51f8f12e335cca2dd0f6cdd7e26c9724a644b6ada26bd5cfad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F8 5048 bytes
font_01_sfnt_off000069eb.bin
43c6830e6ba8b4391c56fe9701e0eacd421fd01b0f9504f8e80238c20021481b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69EB 14096 bytes
font_02_sfnt_off0000964b.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x964B 4324 bytes

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