Malicious PDF — malware analysis report

Static analysis result for SHA-256 71ce75cb81d145a9…

MALICIOUS

PDF

32.7 KB Created: 2020-09-12 11:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aac817552200a3012c9dd387f04fd617 SHA-1: b3b149ad13decd0b8da982360b3ec6faf4c3b0ce SHA-256: 71ce75cb81d145a9b78a575430d09b07f46bbc75941aa5b2fd7bbd2e5666eb46
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body and embedded links suggest a lure related to 'HIPAA online training answers', likely a phishing or spam campaign. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful sites.

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=hipaa+online+training+answers
    • http://files.liveitup4life.com/uploads/1/3/1/8/131857193/3c0c81.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/5e81b9_126ee34437274b4fb60358ec2f5a9ff3.pdf
    • https://static.usrfiles.com/ugd/e6092c_83707eae39af4639a61ad0d1bbba446b.pdf
    • https://static.usrfiles.com/ugd/a72fa8_15fe48070566468389fc159e3982cdd3.pdf
    • https://static.usrfiles.com/ugd/d51d36_7ef9d861f4d5475cb3651362d3e612db.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_865dce3fc90c4e33b1f915d72ae5d97c.pdf
    • https://static.usrfiles.com/ugd/3f8d85_d9090b39936f4bc9bc83de643aca18f5.pdf
    • https://static.usrfiles.com/ugd/03dcd4_bd7f61ef63e849d995af861c475526bf.pdf
    • https://static.usrfiles.com/ugd/5bb01c_cdd2f0a9ff814b30b0a3da0a69c07868.pdf
    • https://static.usrfiles.com/ugd/1da05d_14ada837fc694ccd8b84706734fc4ad9.pdf
    • https://static.usrfiles.com/ugd/7198c1_76d3b960cf7b4562b5493aaf5f6135ce.pdf
    • https://static.usrfiles.com/ugd/5b9a87_c8cb2d8327fe4fa5a8e17979ef7bf297.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_20fd0544885a4af0a160c751635662c8.pdf
    • https://static.usrfiles.com/ugd/a421e3_431e17414a5642dcb9987aafd5a5330b.pdf
    • https://static.usrfiles.com/ugd/ce14f3_d03b87af0a79440fac7c73a7993957e4.pdf
    • https://static.usrfiles.com/ugd/c81504_b8cc19c60cd5474498311dc0cc32d941.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_off00004478.bin
0dab201a14c65a4bd52d73fde7a792ea627431e0f8fefa298200943173c91f67
pdf-font-stream PDF embedded font (sfnt) at offset 0x4478 5040 bytes
font_01_sfnt_off000055b9.bin
e023bad8651f4f37bde0c8701841968e90c0b0971b0a875b38db4336fcf61af4
pdf-font-stream PDF embedded font (sfnt) at offset 0x55B9 9456 bytes