Malicious PDF — malware analysis report

Static analysis result for SHA-256 6284496140daf333…

MALICIOUS

PDF

54.9 KB Created: 2020-09-06 01:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea91b7bbd228f96b1b1a19fe214ffe3e SHA-1: 69dd23a1c4f1c9fd33d7c24ece7cdc8435cf6593 SHA-256: 6284496140daf333e6464938aa927f76b339c9e7679b4a67d925457dac98060f
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The presence of a large number of external PDF links suggests a link farm designed to attract traffic. While no scripts were extracted, the overall structure and the malicious URL indicate an attempt to redirect the user to a malicious site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/wix?keyword=bollywood+horror+movies++mp4
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://static.usrfiles.com/ugd/b65acf_f7d7614d9e27417b8c58b0ca90700c21.pdf
    • https://static.usrfiles.com/ugd/f46427_0b8d4a5fff4240a7a845bd5bbc6ac20f.pdf
    • https://static.usrfiles.com/ugd/78daac_5d9fc90fb8984254a8b0b977c42e7612.pdf
    • https://static.usrfiles.com/ugd/b8c837_396629ec99d94ffd808ba9b983161948.pdf
    • https://static.usrfiles.com/ugd/b8c837_89027fff57e94213849352ac165389d1.pdf
    • https://cdn.shopify.com/s/files/1/0441/0834/9592/files/nofepugegi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5541/5445/files/wuvegajekarijavewazet.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/39788637654.pdf
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/vokimibe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/mavupinot.pdf
    • https://static.usrfiles.com/ugd/bc79a4_6146fa37c04b49d29c83423018cee934.pdf
    • https://static.usrfiles.com/ugd/0dd040_ff1ae2213b804d0c9823d81521fb307c.pdf
    • https://static.usrfiles.com/ugd/e2b09b_fbef2bcb22644bdfbafe1c4653dd8fbb.pdf
    • https://static.usrfiles.com/ugd/e1d12c_189f13381c38481f8af75b1ad9929d47.pdf
    • https://static.usrfiles.com/ugd/930050_c429e616638e4437a0322e20f770a773.pdf
    • https://cdn.shopify.com/s/files/1/0433/4095/5803/files/a_d_ka_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/vezenakuwovirunibugapumik.pdf
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/93009126742.pdf
    • https://cdn.shopify.com/s/files/1/0440/7951/3752/files/36567283589.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0928/files/bimanual_coordination_relative_phase.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.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007028.bin
381188f4480e18992d25255188cb202b578c217fe48c539d92a9eed535095e6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7028 5380 bytes
font_01_sfnt_off0000826d.bin
b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x826D 3720 bytes
font_02_sfnt_off00008dd0.bin
a5ed77f07bccc15743a92104f943e6627565119cf223e3369fe63e15f1b5a5f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD0 11024 bytes
font_03_sfnt_off0000b247.bin
5e9e19606c2f6a021eac8724a5db619f7eacb4f8f4ef0945c8a48cdcbf24622e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB247 8380 bytes

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