Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e38b9b6f270ba8…

MALICIOUS

PDF

48.4 KB Created: 2020-08-25 21:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92444f52f287414b601190783a0c3fcd SHA-1: 3c682c7eed42b208b866c7f88b37e3176ea9d968 SHA-256: 03e38b9b6f270ba80d6da874f1d3de169e1d8b13a12ecfbc9f37a3d19060034c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was identified as malicious by an ML classifier and contains a link farm of 19 PDF documents, many hosted on Shopify. The primary link directs to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to HP Pavilion specifications, likely a lure to encourage clicks on the malicious links. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.link/pify?keyword=hp+pavilion+dv9000+17+specifications
    • http://files.herbstlegal.com/uploads/1/3/0/8/130874379/0deb1b0b.pdf
    • http://files.dizzycoach.com/uploads/1/3/0/8/130874129/redesoba-xurun.pdf
    • http://files.craiglewismurals.com/uploads/1/3/1/3/131379395/3538830.pdf
    • http://rolug.graciayverdadmemphis.com/uploads/1/3/1/3/131398455/855c4bc10.pdf
    • http://files.bnmta.org/uploads/1/3/1/3/131398334/6526179.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pexivopagutufaxusezonav.pdf
    • https://cdn.shopify.com/s/files/1/0454/6691/0872/files/55153719367.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2056/files/buxoporunam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9924/3174/files/jolikepapunanigeselusepov.pdf
    • https://cdn.shopify.com/s/files/1/0431/6119/0559/files/15572300447.pdf
    • https://cdn.shopify.com/s/files/1/0429/7218/4732/files/fijalasalufavogekiporo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8136/files/hypertension_guideline_2017.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5809/files/53343287292.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/36944259269.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1296/files/chess_game_information.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/how_to_automate_the_boring_stuff_with_python.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3912/files/98495210985.pdf
    • https://cdn.shopify.com/s/files/1/0429/9931/6639/files/2985040710.pdf
    • https://cdn.shopify.com/s/files/1/0462/3283/0106/files/kugokovojerijisejinujapex.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/
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cfd.bin
cf4fe653d6e9958fe1bb910350a3edac2e2280603ac94253548b8d43572dc15e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFD 5504 bytes
font_01_sfnt_off00007fc8.bin
be38186c9256ba0e64b07d34cca2e63b176d3ffd182ae4667a642b503e748fe0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC8 6148 bytes
font_02_sfnt_off00008fa8.bin
63a4eaf9a04af8327c303aecfeb75706e12d394d38000c6afb548732acb11573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA8 10644 bytes

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