Malicious PDF — malware analysis report

Static analysis result for SHA-256 a10d310f96c978d9…

MALICIOUS

PDF

41.2 KB Created: 2020-08-15 01:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0380b7470d26993284ef08c3e6b4457e SHA-1: f017a1fd7ef066fa801f3f8b9a92c6ef0608ddca SHA-256: a10d310f96c978d95d7798b4417ff352d289c1ddece2c1f92b8a44cd4dfa7aa5
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. It also functions as a link farm, as indicated by PDF_SEO_LINK_FARM, directing users to numerous external PDFs. The presence of a visual download button lure (SE_DOWNLOAD_BUTTON) suggests a social engineering attempt to trick the user into clicking the malicious link, which leads to the ttraff.ru domain.

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.ru/pify?keyword=simplifying+multiplying+and+dividing+radicals+worksheet
    • http://bagujufij.veterinarni-technika.cz/uploads/1/3/0/7/130739625/2684063.pdf
    • https://cdn.shopify.com/s/files/1/0443/0499/0364/files/alpha_beta_pruning_example.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/88586866885.pdf
    • https://cdn.shopify.com/s/files/1/0437/2260/4695/files/catia_electrical_harness_design_training.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/10978823387.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/83770246571.pdf
    • https://cdn.shopify.com/s/files/1/0433/4541/2261/files/32481904952.pdf
    • https://cdn.shopify.com/s/files/1/0428/0729/6163/files/jogufufow.pdf
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/sbi_bank_po_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/30016889351.pdf
    • https://cdn.shopify.com/s/files/1/0428/6103/5686/files/jatujebugufijes.pdf
    • https://cdn.shopify.com/s/files/1/0432/1188/2653/files/xasatakuvogebi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0590/1991/files/33286633950.pdf
    • https://cdn.shopify.com/s/files/1/0437/7932/6110/files/chronicle_of_a_death_foretold_chapter_4.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_off000060ec.bin
85bece158af2dc4c6a6861c4fd6198853ff9d282db4b52db74bba6bbcd17422b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60EC 5988 bytes
font_01_sfnt_off0000753b.bin
8a4ae04f40ea74085ac70eed05b54e16423afea3386c7d422db9b3078efa3faa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x753B 9984 bytes

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