Malicious PDF — malware analysis report

Static analysis result for SHA-256 1974870d5ad936c2…

MALICIOUS

PDF

44.8 KB Created: 2020-08-31 11:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 922efaffa7c26355b3abde44426fca39 SHA-1: 1a6760e2fe959ac8e781203af4921db4a3a81f90 SHA-256: 1974870d5ad936c2eddecce94b5f178ed05a254dba4497dc60e36ddbda238e01
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector URL. This suggests a link farm or phishing attempt designed to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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.cc/wix?keyword=razon+de+cambio+promedio+e+instantanea
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/cfbfd2_f3d4c0b5d3ec438aa9cfcf476a9472ae.pdf
    • https://static.usrfiles.com/ugd/a64c8c_b472e6411991431296445b067a82177b.pdf
    • https://static.usrfiles.com/ugd/21a131_656c61d31b83464db3e9d3aa1e4bd00b.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_13bfa5a9f0a6424d90210ba943e3a035.pdf
    • https://static.usrfiles.com/ugd/b8c837_9336957ca8c0459e9f0b73704def7569.pdf
    • https://static.usrfiles.com/ugd/9757e7_7cec5146924f44b58a49d859fc8f3320.pdf
    • https://static.usrfiles.com/ugd/3aca14_9394906335ef471496f46078cacdff4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad69518613604b57992494a838919344.pdf
    • https://static.usrfiles.com/ugd/b8c837_b665a348b6144919aacb5c9f5cfc3fc8.pdf
    • https://static.usrfiles.com/ugd/b7306e_888810fbc2824288945f53882c171072.pdf
    • https://static.usrfiles.com/ugd/b8c837_c20b638aa6674bffbd0ea5704d0f8d8f.pdf
    • https://static.usrfiles.com/ugd/b7082a_15d81efb64b14431a6f7db335f97a64d.pdf
    • https://static.usrfiles.com/ugd/e3ff21_f666dba01d63479c98a21992b8208024.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/mindfulness_breathing_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0430/7510/9018/files/funepuvakepego.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3077/files/dupatibo.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dab.bin
ae40ce5a07cd7a21c4619203426e03ec0bd2eb9faf968152afcc7b7e8e82331b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAB 5384 bytes
font_01_sfnt_off00007fe3.bin
e1ab53422bda8b21a5d47a2df061d6367f4db3934d5747da162eb46bdbf6eaa8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE3 11240 bytes