Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3f707cb757d30ed…

MALICIOUS

PDF

58.6 KB Created: 2020-08-12 03:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b805a64fa224c4839ddc7f1bd6e45f9a SHA-1: 6414050e1c9eb2a9a1e7637f912a3355b732ff6c SHA-256: b3f707cb757d30eda7c70bd6f6023264115c65996cdfe5a348cffcaae08638fa
128 Risk Score

Malware Insights

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

The PDF contains a high number of links to external resources, many of which are hosted on compromised or low-reputation domains, suggesting a link farm or redirection strategy. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure. The presence of a visual download button further supports a deceptive download lure. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

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.cc/wb?keyword=download%20arihant%20books%20free%20pdf
    • http://bamaruxa.marshamholistictherapy.co.uk/uploads/1/3/1/1/131164250/5702142.pdf
    • http://files.natashasteer.com/uploads/1/3/2/7/132740467/welexazemifigis.pdf
    • http://files.sassyandgrassy.com/uploads/1/3/1/6/131637679/sugidupotego_mupifumajo_fenafolato.pdf
    • http://files.valleyhuntervizslas.com/uploads/1/3/0/9/130969695/mezuget.pdf
    • http://files.iwpakistan.com/uploads/1/3/1/0/131070526/fopozefadoruxivenap.pdf
    • https://cdn.shopify.com/s/files/1/0437/2565/2117/files/install_mac_os_from_usb_in_windows.pdf
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/75924187086.pdf
    • https://cdn.shopify.com/s/files/1/0440/1269/9798/files/fewozogadozufapete.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/zorusepatofolivosixobogot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65105912314.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/sasapuxulimusepu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/application_of_priority_queue_in_data_structure.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/991414670.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/jimidaleg.pdf
    • https://cdn.shopify.com/s/files/1/0437/2869/9553/files/barrows_setup_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/english_speaking_topics.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2406/files/magic_chef_dehydrator_manual.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e2d.bin
7b5391aa0926c6601b631ab3423ae8dfa7d7798bdc053c39bbed26d7f0d5bfca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2D 5212 bytes
font_01_sfnt_off00007fe2.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE2 3720 bytes
font_02_sfnt_off00008b45.bin
1de8bd36cfd736fc8625be107bbf803ec215fe0c8a7bd69a14792c6d756c9c2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B45 10060 bytes
font_03_sfnt_off0000adbe.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADBE 4324 bytes
font_04_sfnt_off0000bbc0.bin
4b702a14746cefea629c2df1e82efa8be6559c6275b3df5bb29e9218925010cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC0 10368 bytes

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