Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68d8c6c81502afc…

MALICIOUS

PDF

41.7 KB Created: 2020-08-31 02:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 630792b84145ba8857e2d685c88822ad SHA-1: 05943b30d6edfca22a85186cec61a0b67c474dd2 SHA-256: d68d8c6c81502afcd5fed801c21297afa1b778bb31be72f4dfbf67b6bd93b582
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 'ttraff.ru'. This URL is presented within the document body, disguised as a search result for 'lg 55lf5700 reviews'. The PDF also contains a link farm heuristic, indicating a large number of embedded links, with the first one leading to a Shopify domain. The primary malicious IOC is the redirector URL, which likely serves as a gateway 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.ru/wix?keyword=lg+55lf5700+reviews
    • https://cdn.shopify.com/s/files/1/0437/1175/8491/files/klb_biology_book_4.pdf
    • https://cdn.shopify.com/s/files/1/0428/1673/3340/files/1772664865.pdf
    • https://cdn.shopify.com/s/files/1/0434/6219/7400/files/15057773966.pdf
    • https://static.usrfiles.com/ugd/76de1a_46346ab20f6048e0a71d7bf4084d0cb4.pdf
    • https://static.usrfiles.com/ugd/cd79e3_8614258cf3e347c9bd7b32b80d3b495a.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e013ddffe1141b6ae4e7d874a777881.pdf
    • https://static.usrfiles.com/ugd/eed56f_dfa0b0bbf5314af68604adf7fdd005a6.pdf
    • https://static.usrfiles.com/ugd/3f4b99_38bf3eb77a8846da8ec99c21096b9555.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/potufi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8790/4422/files/46476136054.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8918/files/3d_car_models_free_fbx.pdf
    • https://cdn.shopify.com/s/files/1/0441/4462/3768/files/74703559888.pdf
    • https://cdn.shopify.com/s/files/1/0431/2583/3882/files/avl_tree_java_implementation.pdf
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/clinical_chemistry_principles_techniques_and_correlations_7th_edition.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_off0000649e.bin
831e76a0bc42a7c011e4f85bb957722d263dc7fca1b956b95c40bbc2ce0a7fad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x649E 5164 bytes
font_01_sfnt_off0000766b.bin
21f6c396db41ddeb6115d82d09f1ac0d9f9da003fc7f22e16680843cd50a65c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x766B 10364 bytes

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