Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a110920a7bbfa9…

MALICIOUS

PDF

42.9 KB Created: 2020-08-11 02:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56f3ca956217e3d22b6747524c3e4533 SHA-1: 4cb40c88038011f5f42a67e591abd1ca6e9e31d5 SHA-256: 27a110920a7bbfa9e4008ffa48623d9229553071b68fba2ca525070123a5df3f
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=exercicios+cations+e+anions+pdf'. This indicates the document's primary purpose is to lure users to a malicious site. The presence of numerous external PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO manipulation tactic to obscure the malicious redirector. No scripts were extracted from this sample.

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.cc/pify?keyword=exercicios+cations+e+anions+pdf
    • http://files.saxophonistforhire.co.uk/uploads/1/3/1/3/131378779/gatete.pdf
    • http://files.sweetsouthernmessnc.com/uploads/1/3/1/1/131164272/6274062.pdf
    • http://files.sachemeastlacrosse.com/uploads/1/3/0/9/130969356/nolexunerakusopivuj.pdf
    • http://tamabobu.therawfoodgirl.com/uploads/1/3/1/3/131380505/guzojolajo.pdf
    • http://kixinulow.mr-organics.eu/uploads/1/3/1/4/131453540/74986c.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/woforirurebizisomirubak.pdf
    • https://cdn.shopify.com/s/files/1/0435/8632/2600/files/oxford_english_pronunciation_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0431/0895/8362/files/84676189021.pdf
    • https://cdn.shopify.com/s/files/1/0437/6032/0663/files/komed.pdf
    • https://cdn.shopify.com/s/files/1/0433/5088/4505/files/73615201384.pdf
    • https://cdn.shopify.com/s/files/1/0431/3274/7927/files/redokamarodudivotufife.pdf
    • https://cdn.shopify.com/s/files/1/0437/5815/7982/files/sexomumefijomepetijita.pdf
    • https://cdn.shopify.com/s/files/1/0433/4764/0469/files/femunolatisogulu.pdf
    • https://cdn.shopify.com/s/files/1/0436/8472/4889/files/boston_marathon_map.pdf
    • https://cdn.shopify.com/s/files/1/0427/7351/2359/files/gusujenegi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9520/files/635717090.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_off0000694b.bin
0a8cbaf7c7382d6f50c1a26092156f02f6232eb35e0cb848feea5dbb3dace62f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x694B 5144 bytes
font_01_sfnt_off00007ad7.bin
0f3abe8b1e3ff0bd22133daecc7d25f878df506fab9fce03760356924b6aee8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD7 10860 bytes

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