Malicious PDF — malware analysis report

Static analysis result for SHA-256 824470b090af07af…

MALICIOUS

PDF

44.3 KB Created: 2020-09-01 02:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8501ec2559c0e55512b80d28e7ab637 SHA-1: 5569972669035934501253eb600616750984701a SHA-256: 824470b090af07af456b7838a0930d8c48d1c36d4217371ba15dec1a7d003061
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Auckland central map pdf', suggesting a lure to disguise the malicious intent. The presence of numerous external PDF links, many pointing to Shopify, further indicates a link farm or redirection scheme designed to obscure the ultimate destination.

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=auckland+central+map+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3378/7542/files/zebugo.pdf
    • https://cdn.shopify.com/s/files/1/0446/9764/9306/files/holmesglen_institute_referencing_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/94355204160.pdf
    • https://cdn.shopify.com/s/files/1/0428/5199/1719/files/azonnali_hatly_felmonds_minta.pdf
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/19370497360.pdf
    • https://static.usrfiles.com/ugd/74e905_d4f78fe9b7ed47bca83225785f205e7f.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/33286017662.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6650/files/exercise_for_back_pain.pdf
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/fogemofopebin.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1294/files/gilodat.pdf
    • https://static.usrfiles.com/ugd/c7a620_4dd95b79fb4d4a52b25df6109f2ff7a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a9734a297ca4871a6edb910b305b522.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b05.bin
013fd92974f08906ab70382b5799bd768cff54998ae06ac9a3995868b5fd6880		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B05 4620 bytes
font_01_sfnt_off00005b65.bin
604a0ba1869739365264ecf09c2eae510f309e7dd0b74b10b4bcc072ad25b1c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B65 5176 bytes
font_02_sfnt_off00006ced.bin
ecc7c3a0393096f073203153b7248e43dcddd5b2eb827dd6be2e6e575960f83d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CED 5060 bytes
font_03_sfnt_off00007d75.bin
442cc83bb1b076eb6a3e5b098d8d7102f436e4b87e0383177eb1f2c04f483dde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D75 11456 bytes

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