Malicious PDF — malware analysis report

Static analysis result for SHA-256 69a04260c758d87e…

MALICIOUS

PDF

46.7 KB Created: 2020-08-18 23:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07f76a0776b0a34597eb67f619ad7b6e SHA-1: ace3c5db3d0e5fce32ac21461560f5428c31eaf8 SHA-256: 69a04260c758d87e515f65c541c6ba169c70587bd3521f70b9a31c4c6d5578d2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with 26 external PDF links, including a known malicious redirector at ttraff.com. The document body, though partially obfuscated, contains the same lure text as the malicious URL, suggesting an attempt to disguise malicious activity. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=sheet+cake+designs+for+baby+boy+shower
    • http://files.mindandheartlab.com/uploads/1/3/1/4/131414743/zufetoroxanipa-nidexisezurav-tukeniwijudoven-sidabupabixilub.pdf
    • http://files.all-guard-solutions.com/uploads/1/3/2/6/132681690/gemuzum_koxiponi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/6461/4303/files/meranebidezijigorafuri.pdf
    • https://cdn.shopify.com/s/files/1/0431/5611/1520/files/avery_5160_address_label_template_for_word.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/69578809173.pdf
    • https://cdn.shopify.com/s/files/1/0430/8185/9225/files/63027523646.pdf
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/gidomenitonurinubonij.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0514/files/nalosatowumuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/5796/2405/files/fadorelalo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/20024917867.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6285/files/mugerorigufenefuropip.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5456/files/73861086058.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/89397682316.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000692d.bin
2a48213feebf2a97217c0b007776026beabec96410ba67ff9c8d4184b9525632
pdf-font-stream PDF embedded font (sfnt) at offset 0x692D 5540 bytes
font_01_sfnt_off00007c05.bin
f0cc63979205f8ed2ff01c85b2a9ea97152baeb8990dad4484108c612af865d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C05 10544 bytes
font_02_sfnt_off00009fe0.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE0 4324 bytes