Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cff7fcc47febbb1…

MALICIOUS

PDF

43.8 KB Created: 2020-08-23 01:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8b963d9db22b10cca6056c85929070b SHA-1: 0a1b3823febc4f7ece347150a5ec20bc6ed7bcd3 SHA-256: 9cff7fcc47febbb1cbbb7738b36de2fdcd602d188087fb426e6c47cc8d8dd53a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a specific redirector URL, indicating a malicious intent to lead users to harmful content. The ML classifier strongly flagged this PDF as malicious. The primary malicious URL is https://ttraff.cc/pify?keyword=avery+labels+14+per+page+a4+template, which is designed to redirect users. The document body, though heavily obfuscated, contains references to the Avery labels template, likely serving as a lure.

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/pify?keyword=avery+labels+14+per+page+a4+template
    • http://files.paintballprops.com/uploads/1/3/1/4/131437508/varaxunirodaxe.pdf
    • http://vevel.qslowsmoked.com/uploads/1/3/1/4/131406535/5563854.pdf
    • https://cdn.shopify.com/s/files/1/0440/4396/0485/files/word_family_list.pdf
    • https://cdn.shopify.com/s/files/1/0435/1678/8900/files/kotamikunutijuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/7546/0517/files/43258351480.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/akreditasi_unsri.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/busirifije.pdf
    • https://cdn.shopify.com/s/files/1/0430/8025/3593/files/livikenufowibip.pdf
    • https://cdn.shopify.com/s/files/1/0435/2717/6343/files/59895522853.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/socomec_atys_d20_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/muporoxumakamefor.pdf
    • https://cdn.shopify.com/s/files/1/0439/6757/8270/files/video_converter_android_terbaik_2018.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/
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/akred

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006177.bin
f1c99cf73b9403426418c111707869f62c730d66b87657e627cc09bb93922507
pdf-font-stream PDF embedded font (sfnt) at offset 0x6177 5572 bytes
font_01_sfnt_off00007471.bin
bb07fb7f3132b80a779b31b6c38a2216a6848fe1ff8a19eb81a76b61fda4d485
pdf-font-stream PDF embedded font (sfnt) at offset 0x7471 14660 bytes