Malicious PDF — malware analysis report

Static analysis result for SHA-256 1360f1f1776b2000…

MALICIOUS

PDF

51.2 KB Created: 2020-08-30 11:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f71cbb739bfb9e25e6f57418d77a91f2 SHA-1: 80639606f7384d8df24810d014e61a4a445716f8 SHA-256: 1360f1f1776b20008bbbb2fb5f90fae3465410ce3dd7b894965a488b0f547a27
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL that is flagged as malicious, likely serving as a lure for a phishing or scam operation. The document also hosts a large number of external PDF links, suggesting a link farm for SEO manipulation or to distribute further malicious content. No scripts were extracted, but the presence of embedded links and the malicious redirector strongly indicate a 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.com/wix?keyword=samsung+dryer+error+code+e9
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_232b2ce46f504b449e36880dc647fa5a.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7807bcadfb849dea0642997cd7616ff.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_86bd3b476ea14b3daf775816cd3492a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a4efbfdb90b458abc7854d09df9785c.pdf
    • https://static.usrfiles.com/ugd/3aca14_f63b0e7e79854952add13b85adc9315a.pdf
    • https://static.usrfiles.com/ugd/7baf93_e45c17b010e0461eb7ff06d2dd78ad6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_1047222140094212abc2e0fb59586faf.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6b032325d904897bf9cf1e87d7ac8a1.pdf
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/enterprise_10k_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/9546/5892/files/wasomigotuxilaxelonoxesi.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000745e.bin
af69adfd5072c192450f25ba95723c2c04883889d7b16ea5de68a9c7bfaf565e
pdf-font-stream PDF embedded font (sfnt) at offset 0x745E 5588 bytes
font_01_sfnt_off0000873f.bin
3b417b76b0c0290d0b1e16ecefaaa20f01eeee9820cd665deb6a642b64e5f388
pdf-font-stream PDF embedded font (sfnt) at offset 0x873F 10128 bytes
font_02_sfnt_off0000aa08.bin
bd808500338909769585584e65f3b64071d01fb03a347d5c6469e1d94fafae1e
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA08 16400 bytes