Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c19f0ecbfa951c…

MALICIOUS

PDF

44.1 KB Created: 2020-07-10 11:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50422d3d362c7641cc7f5fdcb96dbe68 SHA-1: bd57f9593f27d3753f30acf75a1092772a0e3ea5 SHA-256: 88c19f0ecbfa951c766924981044205f618fc5a9d5e20465611cc955952dede9
120 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, disguised as a document download. The heuristic firings indicate this is a link farm designed to redirect users to malicious infrastructure. No scripts were extracted from this sample, but the embedded URLs are the primary mechanism for the attack.

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=embedded%20system%20in%20automobiles%20pdf%20download
    • http://files.bexleycelebrations.org/uploads/1/3/0/7/130775520/2156046.pdf
    • http://files.maritzavives.com/uploads/1/3/2/8/132815346/zotowelew_lotavapibo_zevubebesoden_sodagufeje.pdf
    • http://files.polarstaryouth.com/uploads/1/3/1/6/131636746/petepokomak.pdf
    • http://files.cristinavannel.com/uploads/1/3/2/3/132303146/timorojixux.pdf
    • http://files.customerfocusedlearning.com/uploads/1/3/0/7/130738814/bavajesapamukogobos.pdf
    • http://files.reikiwithlouise.com/uploads/1/3/1/4/131482808/77a7331299331f8.pdf
    • http://files.kerricoledesign.com/uploads/1/3/1/4/131483318/e8d4b9bf4ea.pdf
    • http://files.urbanmuttretreat.com/uploads/1/3/1/4/131482926/lotemetofoxogafaxi.pdf
    • http://files.novaprint.com.sg/uploads/1/3/1/1/131164252/e65816824aa3c7.pdf
    • https://mewazaxudo.files.wordpress.com/2020/06/75957650470.pdf
    • https://terutil.files.wordpress.com/2020/07/87174500768.pdf
    • https://tepegajax.files.wordpress.com/2020/07/latugi.pdf
    • https://tozoxisot.files.wordpress.com/2020/06/debax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bafewemuwidizisaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2857609843.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53940500656.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15501301831.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vijob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tivaluzisezulumavolo.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_off00006eba.bin
2266b674af4b7d215cedef44ac350ea07e3008e586b07eec65c64dea49b4d54a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBA 5264 bytes
font_01_sfnt_off0000809f.bin
4eb313a9bf6ebe2570553c94a711ecb66339f8fb1ea98af764a0124cb31184db
pdf-font-stream PDF embedded font (sfnt) at offset 0x809F 10176 bytes