Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be1c5b5b277e543…

MALICIOUS

PDF

44.1 KB Created: 2020-08-30 11:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ccb5f6a399f5eda6ec1d4cd250942ca SHA-1: 3cf19b8565de46a92e7d4f937ff6af1b4a6feaa8 SHA-256: 5be1c5b5b277e54336f6d6e62e9b34dc5e828236cf494187e9cd542231dcb3be
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body and embedded links suggest a lure to external websites, likely for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL is a high-confidence indicator.

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=burning+chrome+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8917/3411/files/aaxa_projector_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/4659/2924/files/vewej.pdf
    • https://cdn.shopify.com/s/files/1/0436/4910/6073/files/41838462791.pdf
    • https://cdn.shopify.com/s/files/1/0431/6502/4416/files/veni_sancte_spiritus_taize.pdf
    • https://cdn.shopify.com/s/files/1/0430/1098/2041/files/pekegugubumodogasod.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4684/files/fegijopalusepugezavolefo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/sadikakobofonimasi.pdf
    • https://cdn.shopify.com/s/files/1/0438/8143/1195/files/75244632236.pdf
    • https://cdn.shopify.com/s/files/1/0433/3423/8362/files/kasimovofixowej.pdf
    • https://static.usrfiles.com/ugd/8b2c09_7844c463538d410bb5f052ffadbafc10.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a0d2140dc5c485c8c0658163308a9da.pdf
    • https://static.usrfiles.com/ugd/8de238_c04984370bf340c8982c4b5a7f96747b.pdf
    • https://static.usrfiles.com/ugd/22739b_43a6571c9e4146eda20963de9a097eb7.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/duwaxufezemurogagur.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/18097492602.pdf
    • https://cdn.shopify.com/s/files/1/0438/4754/9088/files/asepsie_chirurgicale.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_off00006fab.bin
6858b7bdc59a0205a61527bbb6b6f2894f908972f32489da9ad6b6443fe567c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAB 5200 bytes
font_01_sfnt_off0000812e.bin
62a6de0a28dd1a0dc64e1789111c0766b8db14171c0a2353c90cd090069d9cae
pdf-font-stream PDF embedded font (sfnt) at offset 0x812E 10088 bytes