Malicious PDF — malware analysis report

Static analysis result for SHA-256 f20600b4ad2faaa6…

MALICIOUS

PDF

50.9 KB Created: 2020-08-12 20:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a99a7fa42891f484422f2e362544ec3 SHA-1: b88bb2379470e0239e1223d39bfe0d3f97db3fc6 SHA-256: f20600b4ad2faaa6692d08fe475be9d920e8aa2aa736f4ad93da518906ea6bf5
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body text, though partially corrupted, contains a URL that promises a free download, likely serving as a lure. This URL points to a redirector which is a common technique for delivering malicious payloads. The file also contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm used for SEO poisoning to increase visibility of 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.com/wb?keyword=ms%20word%202010%20shortcut%20keys%20pdf%20free%20download
    • http://files.truthtellerpub.com/uploads/1/3/0/7/130738921/3562108.pdf
    • http://files.servicesgoglobal.com/uploads/1/3/1/3/131380467/4725000.pdf
    • http://lixepul.anniestexasmusings.com/uploads/1/3/1/4/131407406/mevobiduzipozas.pdf
    • http://files.janethunter.com/uploads/1/3/0/7/130776567/8c1e66ea4035.pdf
    • https://cdn.shopify.com/s/files/1/0431/2888/1313/files/48916301013.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0309/files/xasawowasonagofo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5091/files/wogezifidenenojok.pdf
    • https://cdn.shopify.com/s/files/1/0434/9529/3094/files/tipos_de_argumentao_jurdica.pdf
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/jufede.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/10548809775.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/30323083479.pdf
    • https://cdn.shopify.com/s/files/1/0430/5692/2777/files/35126381917.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/kiburaxiboze.pdf
    • https://cdn.shopify.com/s/files/1/0434/4306/0901/files/pathogenesis_of_heart_failure.pdf
    • https://cdn.shopify.com/s/files/1/0432/2285/9943/files/15204067791.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92904811518.pdf
    • https://cdn.shopify.com/s/files/1/0431/9127/1586/files/fusekufojimojixuxivedi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8818/3456/files/celestar_ballista.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_off00006c31.bin
d62efd70066c72f8531656f797abe2d49c8b68d041c0204aa12aad49531c65d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C31 5664 bytes
font_01_sfnt_off00007f9d.bin
6a92cc957ab50b39892b2e9e41ad7e136025de91f6ae481893fd040e2c96f0f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9D 14448 bytes
font_02_sfnt_off0000ad8f.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD8F 4324 bytes