Malicious PDF — malware analysis report

Static analysis result for SHA-256 f20d957edcf1b8df…

MALICIOUS

PDF

46.9 KB Created: 2020-08-08 00:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6533434a5af71742aa68cdef5f48425c SHA-1: 0f4a3ab19e3f506c1b96e6595ce9dcb21b2dea94 SHA-256: f20d957edcf1b8df9ed6ea37b2f2a3220c7e03378c0d162f3caed8ba20eb83ff
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.001 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating a lure to external malicious content. The document body, though heavily obfuscated, contains text related to 'Balance general cuentas pdf' and includes the malicious URL https://ttraff.cc/pify?keyword=balance+general+cuentas+pdf, suggesting a phishing or malware distribution attempt. The presence of numerous external PDF links, including one to cdn.shopify.com, further supports the link farm heuristic.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/pify?keyword=balance+general+cuentas+pdf
    • http://files.valeriaflorescano.net/uploads/1/3/1/4/131438240/cd24b9b495795a.pdf
    • http://files.blueridgewelsh.com/uploads/1/3/1/1/131163599/kuvamesupum.pdf
    • http://files.coastalk9c.com/uploads/1/3/0/7/130775180/0f293051ea7.pdf
    • http://files.christchurchjax.net/uploads/1/3/0/9/130969211/kefuramuzerexizak.pdf
    • https://cdn.shopi
    • https://cdn.shopify.com/s/files/1/0447/9424/9377/files/bearing_puller_skf.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/nusagozap.pdf
    • https://cdn.shopify.com/s/files/1/0431/0433/8077/files/9877859849.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/marketing_research_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/15382257410.pdf
    • https://cdn.shopify.com/s/files/1/0432/2784/0675/files/sokiduwexibewifobiwata.pdf
    • https://cdn.shopify.com/s/files/1/0431/7816/4384/files/36036943451.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/game_of_thrones_season_5_1080p_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/jezamilerafurolupaxex.pdf
    • https://cdn.shopify.com/s/files/1/0437/4626/3201/files/kujirokuwomipivixafugogi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0875/3827/files/24531261164.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1808/files/colorado_brand_book.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_off00006d0b.bin
56d58fdd0ca3c5260896b3d5a40154da3e5ec28fe56a5df98d7720bc52459fa5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0B 5372 bytes
font_01_sfnt_off00007f58.bin
faa1a0e34df7169ad2f706f032c46dd017df5397535362be76dabf04d8639a1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F58 2260 bytes
font_02_sfnt_off000089b2.bin
ba9bfd2da8994b8143b0ce76fedfc66eacbe54e4fe8019632b350cb18bd0984e
pdf-font-stream PDF embedded font (sfnt) at offset 0x89B2 11236 bytes