Malicious PDF — malware analysis report

Static analysis result for SHA-256 19fb1c3b54166412…

MALICIOUS

PDF

56.9 KB Created: 2020-08-08 20:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ead0611c3b06faf4c2d6e510d2ba9042 SHA-1: 8ff11aa9b353d9e6fd9f6e825319d041747ff6fb SHA-256: 19fb1c3b54166412f14c43e71755338aeac42f410f32be03650218192175ae58
130 Risk Score

Malware Insights

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

The PDF contains a link to a malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a bill and a URL that mirrors the malicious redirector's target. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a link farm, likely for SEO poisoning or to distribute malicious links. The SE_URGENCY_LURE heuristic further supports the social engineering aspect of the attack.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/pify?keyword=occupational+safety+health+and+working+conditions+bill+2020+pdf
    • http://files.auerservis.com/uploads/1/3/1/8/131871642/1313510.pdf
    • http://files.rosieduttonphotography.com/uploads/1/3/0/7/130739533/8896061.pdf
    • http://files.thedancenetworksb.com/uploads/1/3/1/3/131380756/saseti.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/94910497104.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/abrsm_grade_5_theory_paper.pdf
    • https://cdn.shopify.com/s/files/1/0434/7795/8816/files/64166785396.pdf
    • https://cdn.shopify.com/s/files/1/0438/3929/1554/files/zofajofenef.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/siwotixoti.pdf
    • https://cdn.shopify.com/s/files/1/0431/6767/8618/files/big_ideas_simply_explained_science.pdf
    • https://cdn.shopify.com/s/files/1/0435/2675/0359/files/asvab_afqt_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tinoled.pdf
    • https://cdn.shopify.com/s/files/1/0434/5724/9430/files/sukekapodivexegov.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/tuzow.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/43413473786.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/kate_voegele_hallelujah.pdf
    • https://cdn.shopify.com/s/files/1/0439/0617/1048/files/78300972590.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_off00009188.bin
902c5646d87053edd22baffdf2f07a4cb4c61b5b2b79a1fb0a0ff53e0b364975
pdf-font-stream PDF embedded font (sfnt) at offset 0x9188 5996 bytes
font_01_sfnt_off0000a5f9.bin
c33b2265d99101408710a5d3f5793682eefcdfad6513558de42165015e7d62f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5F9 9812 bytes
font_02_sfnt_off0000c77e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xC77E 4324 bytes