Malicious PDF — malware analysis report

Static analysis result for SHA-256 153475f6b383101f…

MALICIOUS

PDF

51.3 KB Created: 2020-08-16 20:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca2371793997afc8199f0b8ce0ca9e3e SHA-1: 39d0857b716d71658d32116c450e68bc788c0c3a SHA-256: 153475f6b383101f6cf21fb77108448838e4cf55d35bad3e7fcfbb785a7f17a1
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains the same redirector URL, suggesting the primary purpose is to drive traffic to malicious infrastructure. The presence of numerous external PDF links further indicates a link farm or SEO manipulation attempt, likely to obscure the malicious redirector.

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=rimedio+contro+formiche+naturale
    • http://files.ckc3.org/uploads/1/3/1/3/131383541/gujifalodavazexer.pdf
    • http://files.georgeayee.com/uploads/1/3/1/3/131398195/dulofewedol-wutivepekatedi-saliwagoxoraz-wipuribamasada.pdf
    • http://fomizi.greenlightbikes.org/uploads/1/3/1/4/131483108/b902bb7aad0.pdf
    • http://files.homeralan.com/uploads/1/3/0/7/130739809/dasafeneguje-tesateve-fuwujifa-zemaviripinipa.pdf
    • http://files.tonibragg.com/uploads/1/3/2/6/132696029/rokopaz-pekelajivipulu-rabujasesed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/23328084352.pdf
    • https://cdn.shopify.com/s/files/1/0434/0911/3242/files/pdf_agama_islam_kelas_10_k13.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4935/files/arthritis_shoulder_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/lapuwibek.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7134/files/23883207706.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1662/files/bosch_oil_filter_review.pdf
    • https://cdn.shopify.com/s/files/1/0435/8576/5533/files/38361440294.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/laxigitifudavizemitipa.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/nginx_too_many_open_files.pdf
    • https://cdn.shopify.com/s/files/1/0434/6426/1797/files/tapubadixev.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a23c.bin
38939a4bd29e3846758173dbe673c6f3682e7e250d7c9c54cfb1e4b38d391e04		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA23C 18512 bytes
font_00_sfnt_off00006da0.bin
46d9fbaee0e7426b5f6c4ce6163951a2f1086d1d32f054c2f83d98b7ae643aa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA0 5092 bytes
font_01_sfnt_off00007ebd.bin
478a30bd8e391abce3d1995a309cd114c6cd15d25f74ccb5e8eea6a3d5f5ae83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBD 10912 bytes

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