Malicious PDF — malware analysis report

Static analysis result for SHA-256 d217994ef887d7d0…

MALICIOUS

PDF

45.0 KB Created: 2020-08-31 14:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 488c65fc5be803c40c6e01f4c5cf8726 SHA-1: 98b52fbc6213d5f319abeed08d023efbdc7c9892 SHA-256: d217994ef887d7d007d2bbea3d9490b7d59d7b26438626aa98177310c6a1161c
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'butterfly life cycle worksheets for 1st grade' and a URL that appears to be a lure. The primary attack vector is likely a user clicking on the malicious link within the document, leading them to a compromised site.

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/wix?keyword=butterfly+life+cycle+worksheets+for+1st+grade
    • https://cdn.shopify.com/s/files/1/0433/7654/1857/files/34751096102.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/bawunu.pdf
    • https://cdn.shopify.com/s/files/1/0440/4789/2630/files/constitutional_convention_reading_comprehension_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/1520/0158/files/5925797116.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/south_africa_hip_hop_instrumental.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2922f2e2c864870b739e3a005f8cb08.pdf
    • https://static.usrfiles.com/ugd/4b7290_b2895168146048f9bbda3166bcaff52c.pdf
    • https://static.usrfiles.com/ugd/b8c837_d50a6f3fbc174090b007423b66107f7a.pdf
    • https://static.usrfiles.com/ugd/3d0627_a21808d4ba324c06bc3c77e5b8417f51.pdf
    • https://cdn.shopify.com/s/files/1/0431/0604/2023/files/hp_smart_app_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0436/6447/4262/files/sujamagopizotomix.pdf
    • https://cdn.shopify.com/s/files/1/0432/3311/6317/files/6253325955.pdf
    • https://cdn.shopify.com/s/files/1/0430/1606/1091/files/65452308881.pdf
    • https://cdn.shopify.com/s/files/1/0433/3993/9994/files/4864622603.pdf
    • https://static.usrfiles.com/ugd/b65acf_0932cfc17fa842cebc292233dee87ecf.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a45e558f3324f9fa88b2b70a111708f.pdf
    • https://static.usrfiles.com/ugd/c63dba_56fc4dc149eb4cb9931cd1f570f972c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_034aabc5073b48489d5b544315c538cb.pdf
    • https://static.usrfiles.com/ugd/b0b521_a1e3d0dafabc46b98ec353ea0f9addbd.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_off00006797.bin
909dec0e6ebb1d373e62eb5508e2a660c522661253d9d3f560629a208f6f62ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x6797 5640 bytes
font_01_sfnt_off00007af1.bin
b800d6f1486a41c5264238956c112629d80cbc1830421a4362511dc02b3c5c33
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF1 13512 bytes