Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d1c7aaa9e004a5…

MALICIOUS

PDF

41.7 KB Created: 2020-08-02 10:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb36c46014aa4a402abedf54c30792c8 SHA-1: 3d611faca3aff2987e31fc94929707457c3ee71c SHA-256: d8d1c7aaa9e004a5327c95f815d265ebb5788f1f18e5bdb965f476cbe5c02192
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links pointing to PDF files hosted on Shopify, indicating a link farm or distribution mechanism. One of these links, 'https://ttraff.com/pify?keyword=echo+cs+310+manual', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body itself is heavily obfuscated but contains the redirector URL, suggesting a lure to external content.

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=echo+cs+310+manual
    • http://files.patriotbandsupport.org/uploads/1/3/0/9/130969633/745dd714c705b.pdf
    • http://files.peepspeak.com/uploads/1/3/1/8/131872285/wepudebatagu.pdf
    • http://files.albertpyun.net/uploads/1/3/2/6/132681504/2ad85.pdf
    • http://files.bcpreventionnetwork.com/uploads/1/3/1/4/131438523/6733442.pdf
    • https://cdn.shopify.com/s/files/1/0437/6304/0408/files/tovefuvejujiviz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2278/6466/files/nha_phlebotomy_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4632/files/cambridge_ielts_10_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/9798/0056/files/sigoki.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2645/files/dutikejuvifujikudeze.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/fallout_4_cybernetics.pdf
    • https://cdn.shopify.com/s/files/1/0434/5954/3192/files/pozunoruvov.pdf
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/neguva.pdf
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/7596960697.pdf
    • https://cdn.shopify.com/s/files/1/0439/4074/1275/files/96887201732.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/mesipufizebosisoga.pdf
    • https://cdn.shopify.com/s/files/1/0431/4618/2822/files/kazarunatetejawoxulafuma.pdf
    • https://cdn.shopify.com/s/files/1/0431/6063/3493/files/81990493940.pdf
    • https://cdn.shopify.com/s/files/1/0437/2476/7400/files/jamubufupunerigipavugugo.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/1/0437/2476/7400/files/jamubu

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000613d.bin
38ed4f62d3efbc58e0914d8eaa5cdf39c49b3779b5679f985483dc71352ffd77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x613D 5256 bytes
font_01_sfnt_off00007301.bin
6144c4ba85d5f6da885c460040e47edd55fa91494d3599586978a2bb88776610		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7301 12288 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.