Malicious PDF — malware analysis report

Static analysis result for SHA-256 1103faae9a6ee66f…

MALICIOUS

PDF

43.9 KB Created: 2020-08-31 05:15:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1263ce3fbc40eec5db7cc53ce88de0c4 SHA-1: 7c685da91f90d4afe0625fd3769c8f3e82ec1e45 SHA-256: 1103faae9a6ee66f49805ddc9494a5955939bf4882108a63232183995358c70d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

This PDF document was flagged as malicious by an ML classifier and contains a large number of embedded links, many of which point to external PDF files. One of the primary links directs to a known malicious redirector. The document's structure suggests it's part of a link farm or SEO manipulation scheme, potentially leading to malicious content or phishing pages.

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=crusader+%25E2%2580%2593+roland%25E2%2580%2599s+legacy
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0463/1897/7186/files/zufafufawiperusiwadujum.pdf
    • https://cdn.shopify.com/s/files/1/0440/3075/4966/files/64236440247.pdf
    • https://cdn.shopify.com/s/files/1/0431/5915/8946/files/28101487677.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/85908073399.pdf
    • https://cdn.shopify.com/s/files/1/0431/6931/7020/files/bajariwuxofilusap.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3041/files/guwaxofikijowowizunutoxiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/3249/4751/files/9819332323.pdf
    • https://cdn.shopify.com/s/files/1/0454/7529/9478/files/causes_of_hypertension.pdf
    • https://cdn.shopify.com/s/files/1/0437/4672/1946/files/latekujegesebevavutuwive.pdf
    • https://cdn.shopify.com/s/files/1/0433/8427/5109/files/lee_loadall_2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/babape.pdf
    • https://static.usrfiles.com/ugd/b8c837_e205eb3363e2408e819946be9afc4edc.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b4af1d3e5da46b993c3cdf2095c5294.pdf
    • https://static.usrfiles.com/ugd/df4650_d0ca8978990e484ebaa361a148ab9c8f.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_off00006ae9.bin
47c56b5143f32fd76c786b9bc2752b55fddd65ec2d3a99d9f15ffe3646274262
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE9 5196 bytes
font_01_sfnt_off00007cb7.bin
a2d819b976535b34e23c06589b767394cb01fb2013a0ac5e401cee858a6c8495
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB7 10716 bytes