Malicious PDF — malware analysis report

Static analysis result for SHA-256 dca918fe73756d2d…

MALICIOUS

PDF

44.6 KB Created: 2020-08-06 21:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08040514f6abcef3232f2037cec5349f SHA-1: 19d892c1f9a1fe623f8a4cc2dd698b95c8e6e7d6 SHA-256: dca918fe73756d2d12886302bb1b541a747ee8c0ac1960cf04a5493ec6c8864c
140 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, and presents itself as a tax form to entice users. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a direct link to malicious infrastructure. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or scam context, likely aiming to trick the user into clicking the embedded links. No scripts were extracted, limiting the analysis to the document's structure and embedded URLs.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=form%201040%20taxable%20social%20security%20worksheet
    • http://files.cassandraroseclarke.com/uploads/1/3/1/6/131606756/534c70d020.pdf
    • http://files.pdkmusic.com/uploads/1/3/1/3/131383541/jijodi.pdf
    • http://files.themailoutpost.com/uploads/1/3/1/3/131379382/lojewixe-kuxokosesekax.pdf
    • http://files.aliciaburdess.com/uploads/1/3/1/4/131408788/vagonudomuta-minupeb.pdf
    • http://files.hongkongsprings.com/uploads/1/3/1/6/131636762/buten_bepelikuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/6089/4627/files/dejakafolawajagixosarenam.pdf
    • https://cdn.shopify.com/s/files/1/0435/1285/6731/files/pifabaxopomum.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/72724913737.pdf
    • https://cdn.shopify.com/s/files/1/0436/7410/8057/files/vowudirewupumiwabi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0789/3919/files/15577969935.pdf
    • https://cdn.shopify.com/s/files/1/0433/8493/0462/files/xerexiferi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/apache_poi_convert_excel_to.pdf
    • https://cdn.shopify.com/s/files/1/0429/7667/3946/files/gaxofej.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/47704349761.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/bhagavad_gita_in_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0434/7258/4861/files/jesig.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/fidukopewijisude.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_off00006053.bin
f61300315ad22d00ab0abaf004278839a0f6d39c9ef9cacb4d558da4666fd64f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6053 5516 bytes
font_01_sfnt_off0000733a.bin
ccbfd3d521743fd540b23468ff49df30116cbc5fcabece8144178db23ed41f91
pdf-font-stream PDF embedded font (sfnt) at offset 0x733A 10536 bytes
font_02_sfnt_off00009733.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x9733 4324 bytes